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From Dreams to Screams: How to Write a Horror Script, Part 2

by Natasha Stares October 16, 2024
by Natasha Stares Published: October 16, 2024Updated: May 16, 2025
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how to write a horror movie script

Creating memorable villains and monsters, complex characters, and how to elevate your script with atmosphere and dialogue.

Weโ€™re back! Welcome to part 2 of our guide to writing your own horror script. Be prepared for more scares and tips thatโ€™ll leave you quaking in your boots, and hopefully inspired to turn your horror movie dreams into screams!

To conclude our guide on horror, weโ€™re here with everything you need to create memorable and complex characters, and building a rich environment and atmosphere to push your scares to the next level. 

Weโ€™ll end our blog with a flourish by revealing all the top tips you need to effectively edit and revise your horror screenplay. If you havenโ€™t checked out our first Dreams to Screams blog on how to write a horror script, youโ€™d better head over there first. 

So, what are we waiting for? 


This blog is part of the Celtx Screenwriting Series. Want to start from the very beginning? Click here!


Creating Memorable Villains and Monsters

Letโ€™s face it, we all watch horror movies for the villains and monsters. How will they terrorize the characters? Will they succeed in their horrific acts, or will they be beaten? Are they supernatural evils, scares that haunt our nightmares, or someone down the street? 

Letโ€™s dig deep into some of the greatest horror villains of all times, what makes them effective, and how we can create our own.

Characteristics of Effective Horror Villains

While many horror villains are human or at least recognizable to us in some way, there is always something subverted in their nature that makes them terrifying. 

Many of them are a blend of the familiar and monstrous, possessing a sense of the uncanny. Immediately, we are thrust into a sense of insecurity as an audience, feeling unsettled. Even if they havenโ€™t done anything remotely scary, we are immediately scared of them; they are relatable yet terrifying. 

For the latest news in horror, check out Bloody Disgusting

Take characters like Pennywise. He is recognizable as a clown, which most of us have been used to seeing since childhood. Yet there is something askew with his nature and appearance, making him automatically spooky.

IT - horror movie
It: Chapter 2 – Warner Brothers Pictures

We can recreate such a feeling in our own audiences with our horror villains. By turning something familiar on its head, we can create a sense of unease early on. 

Other famous villains, we never see at all! Mystery and ambiguity are key in horror movies, so why not have an invisible antagonistic force? Invisible villains, such as in Blair Witch (2016), drives the fear of the unknown in an audience. In Blair Witch, we see snatches of the possible villain, heightening the horror factor.

Blair Witch (2016) โ€“ Lionsgate

Don’t get lost in the woods. Just like The Blair Witch Project, atmosphere can make or break your horror script. Use Celtx to plan your scenes with precision.
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Effective villains also seem unstoppable or relentless in their pursuit of evil. This not only creates further conflict for the characters to overcome, but also a sense of inevitability โ€“ itโ€™s just a matter of how and when the villain will succeed, which keeps us on the edge of our seats.Take characters like Jason Voorhees in the Friday the 13th franchise, who seems invincible and has resurged in many sequels to the original 1980 installment.

Friday the 13th (2009) – Warner Brothers Pictures

Horror villains donโ€™t just have to be evil for the sake of it. Psychological depth and an insight into their fears, traumas and desires can make them more compelling. Hannibal Lector is a prime example due to his brilliant but twisted mind.ย 

hannibal lecter - horror villain
Hannibal (2001) MGM Distribution Co.

By adding layers of complexity to our villains, whether they be human, zombies, demons or witches, we can enhance the effect they have on audiences. The Witch (2015) reimagined Puritan fears and folklore, placing the subject matter deep in reality and providing historical context.

The Witch (2015) – Universal Pictures

Of course, all the above are great approaches to creating your horror villain. Horror is a genre that thrives on archetypes that should be balanced with originality. Classic archetypes such as vampires, werewolves, ghosts and serial killers have been persistently popular, with their own narrative rules. 

To keep an audience engaged, subvert archetypal expectations and twist the established traits into something new. Swedish horror Let the Right One In (2008) did this especially well with the vampire.

Writer John Ajvide Lindqvist created a vampire child who forms a deeply emotional bond with a human. It also begs the question whether the villain is really evil, commenting on the gray areas that can arise.

Rotten Tomatoes scored the film 98%, with the criticsโ€™ consensus favorable.


Let the Right One In reinvigorates the seemingly tired vampire genre by effectively mixing scares with intelligent storytelling.


Let The Right One In
Let the Right One In (2008) – Sandrew Metronome

This movie also combines horror with romance, another way to balance originality with archetypes and create something fresh. Get Out (2017) also did this successfully, but with theme, adding racial tension and social commentary to the psychological horror genre.

Related: Tips for Shooting and Lighting Horror with Director Mike Pecci || No Film School

How to write compelling villain backstories and motivations

We recommend approaching your villains as you would with any character, but focus on the negative aspects to shape their path into evil.

Start by rooting their motivations in trauma or fear, linking their goals to personal experiences, so their actions seem logical. They could seek revenge or control and wonโ€™t stop until they get it, justifying their actions along the way and believing completely in their life philosophy, like Hannibal Lector, for example.

Your villain should always be grounded in the environment, society and history around them. This will help highlight their โ€˜recognizableโ€™ side and enhance their authenticity as a villain. The strict religious beliefs of the family in The Witch are great examples of this.

Bring your villain to life: Use Celtx’s character development tools to craft the perfect backstory and motivations for your horror villain. Ready to pull the lever?
Click here to sign up.

Developing complex characters

Relatable characters are crucial in horror, providing the emotional anchor for the audience. When an audience identifies with a character, the stakes of the movie feel so much more real! 

If, as screenwriters, we establish relatable traits, fears and desires, our characters evoke more empathy. The protagonist in The Babadook (2014) is a struggling single mother, with whom many people can relate. In turn, this makes the horror she endures even more terrifying. 

The Babadook (2014) – Umbrella Entertainment

But how do we create these characters for ourselves? Well, like our villains, we need to ensure our characters have relatable traits, strengths and flaws with clear goals that drive them forward through the plot. 

The characters in A Quiet Place (2018) are a family with the goal of survival, the parents doing everything possible to protect their children. The primal human instinct of protecting the young is something that is with all of us, hence why these characters are so powerful. We naturally want to root for them!

a quiet place
A Quiet Place (2018) – Paramount Pictures

Of course, there are always the characters we want to root against, whether theyโ€™re the villain of the piece or just down-right unlikeable. While some have traits that help us relate to them, others will need to possess qualities that provoke contempt or fear. 

To create these sorts of characters, we recommend using traits deriving from arrogance, cruelty or selfishness. Through these, you can create tension, making their inevitable downfall even more satisfying.  

Whether your characters suffer their downfall or succeed in their goal, they need a character arc to get them there. Arcs come in all sorts, from heroes who begin as naรฏve and weak, but grow to become a resilient and strong figure. Through facing their fears and working through the obstacles thrown in front of them, the character ultimately changes.ย 

On the other hand, thereโ€™s nothing wrong with a juicy downfall and a character who spirals into a pit of madness or corruption. Jack Torrance in The Shining begins as well-meaning but flawed, who succumbs to the supernatural influence of the hotel, transforming him into a monstrous figure. 

The Shining
The Shining (1980) – Warner Brothers Pictures

Whatever type of arc you choose, focus on key moments of change in each characterโ€™s journey. When does their mindset shift? What makes them change? What moral dilemmas must they face? How do their interactions with other characters shape their ongoing development? By answering questions like this, we ensure our characterโ€™s travels feel authentic and engaging.

For a deeper dive, try “On Writing” by Stephen Kingโ€”a book by one of the genre’s masters that offers advice crucial for all writers.

Setting and Atmosphere

Horror relies a great deal on its setting to create conflict and fear. Feelings such as isolation, danger or dread can be evoked purely from the setting, adding to the charactersโ€™ plight.

Many horrors are set in one location, making full use of the environment to incite the scares themselves or elevate them to the next level. Think an abandoned house, a claustrophobic basement, a dark forest โ€“ you get the idea.

Setting also relies on multiple senses. Focusing on what your characters can hear, smell and feel is a great starting point in building an immersive atmosphere. Not only that, but it also draws your audience into your world, making the horror feel more immediate and real.

Examples like flickering lights, eerie silences, unsettling sounds and abnormal smells can help build tension and dictate the pace of your movie, whether itโ€™s a slow burner scene or a jump scare.

From a screenwriting perspective, we want to avoid too much flowery language when describing our setting. Concise and impactful is the key! Here is where formatting is your best friend. Utilize short sentences for pacing, and break up your longer descriptions with action lines or dialogue to maintain flow. You donโ€™t want your descriptions to overwhelm the narrative.

For a more intensive dive: Screenplay Format Essentials: How to Professionally Structure Your Script

Take a look at the opening scene of the Bird Box screenplay. Here we see a brief but impactful description of the setting. Notice how the description is among the action, focusing on what is actually happening and the opening of the story.

horror movie script example
Bird Box (2018) – Eric Heisserer

To immerse yourself in the whole screenplay, click here.

Dialogue and Horror

Like all movies, horror dialogue should feel natural while enhancing terror and fear. Consider how your charactersโ€™ words will foreshadow events, reveal secrets or deepen the sense of dread. Could a casual conversation take a dark turn? 

What a person says can reveal a lot about who they are, their beliefs, fears and motivations. A confident assertive character could come across as a leader, while one who hesitates or stutters may appear anxious. These are rudimentary examples, but you know what we mean!

But of course, dialogue is also about what characters donโ€™t say. Subtext is important to keep audiences guessing and wondering what lies beneath the surface. We donโ€™t express everything weโ€™re feeling just when we speak, so our characters shouldnโ€™t either.

It can be tempting to reveal secrets through dialogue, but use this sparingly. When a character discloses vital information, ensure it has a significant impact on the plot or character dynamics. This doesnโ€™t have to be a loud reveal, but a drip feed of information in quieter moments. 

Short exchanges can heighten anxiety, while longer ones build anticipation. Interruptions, overlapping dialogue or sudden tone shifts are fantastic tools to create urgency.

Craft chilling dialogue.
Let celtx’s read through feature bring your characters to life.

Climax and Resolution

The climax is the turning point of your movie, the height of tension that youโ€™ve been building up to. This should be where your characters face the height of their fears. While the climax is one of the bigger moments in the movie, it should be gradually built up to, allowing the audienceโ€™s anticipation to grow. 

This build up will be through character growth, interactions, and a gradual closing in of the threat. Everything weโ€™ve talked about so far in our dreams to screams series will take you to this point.

Closure usually comes with the resolution, but horror isnโ€™t usually a genre with a wholly happy ending. Horror thrives on leaving audiences with lingering dread. A great technique to use for writing your resolution is to balance tying up loose ends with a desire to evoke lasting emotions. 

After the climactic moment, use your resolution as an opportunity to focus on character reactions and the consequences that have arisen. Both dialogue and action combined will help you do this. 

Letโ€™s return to Bird Box. The resolution focuses on closing the protagonist, Malorieโ€™s, arc. Finally, after five years, she and the children can take their blindfolds off, now safe in the community. After refusing to name the children, she does so, providing closure both for her and the audience, and emphasizing the importance of human bonds.

Bird Box (2018) – Netflix

Perfecting your story’s finale? Learn how to master the resolution in our “How to End a Screenplay” blogโ€”because your horror film’s last impression should be the most terrifying.


Editing and Revising

Now that youโ€™ve written your horror script, itโ€™s time to edit and refine it as much as possible. We recommend completing several โ€˜passesโ€™ of your screenplay, where you focus on one element at a time. For example, read through your script looking for any pacing or consistency issues in your script. Next, focus on your character arcs, your plot, and dialogue to ensure itโ€™s authentic and natural.

Look out for common pitfalls in your screenplay to ensure youโ€™re not relying on cliches or predictable plots that your audience will sniff out in seconds. Focus on subverting convention and taking horror tropes to the next level.

Feedback is also invaluable. Share your script with trusted peers or mentors who can give you constructive criticism. Be open to suggestions and donโ€™t be afraid to make changes if you need to. 

Itโ€™s important to remember that there are only so many edits you can do. Learn to know when your script is done and when itโ€™s time to move onto the next project.

celtx script writing software

Conclusion

Crafting a compelling horror script requires careful attention to character development, atmosphere, and dialogue. By creating relatable characters and villains, you enhance the emotional stakes, making the audience care about their fates. 

Building a chilling setting immerses viewers, while skillfully written dialogue heightens tension and reveals character traits. As you approach the climax and resolution, strive for a balance between closure and lingering dread for a lasting impact. 

Weโ€™d love to hear from you! Share your horror scripts, ideas, or drafts in the comments belowโ€”let’s inspire each other!

Check out our resources here at Celtx to help you organize and visualize your horror projects. And remember, this is just part of our ongoing series on screenwriting; thereโ€™s plenty more to come! 

Stay tuned and follow us on social media for more conversations about all things screenwriting.
Letโ€™s keep the creativity flowing!

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Up Next:

how to write a science fiction script

Beyond the Stars: How to Write a Science Fiction Script
Leave Earthโ€™s atmosphere and head for the stars as we dive into how to create your own sci-fi script! From building an immersive world, to filling it with multi-dimensional characters, and crafting authentic dialogue

Click here to continue…

Or try any genre from the rest of our series:

  • Part 1: Introduction to Mastering the Art of Screenwriting
  • Part 2: From Dreams to Screams: How to Write a Horror Script (Part 1)
  • Part 5: Laugh Out Loud: How to Write a Comedy Script
  • Part 6: From Tears to Triumphs: How to Write a Drama Script
  • Part 7: From Meet-Cutes to Happy Endings: How to Write a Rom-Com Script
  • Part 8: Crafting Magic: How to Write a Holiday Movie Script
  • Part 9: How to Write a Documentary Script: A Step-by-Step Guide
  • Part 10: How to Write a Skit That Lands Every Time
  • Part 11: How to Write a Romance Script that Sweeps Audiences Away
  • Part 12: From Clues to Conclusions: How to Write a Mystery Script
  • Part 13: From Song to Stage: How to Write a Musical Script
  • Part 14: From Zero to Hero: How to Write an Action Movie Script

Ready to Dive Deeper into Horror?

  • Why Flat Characters Make Great Horror Victims
  • Horror Tropes We Loveโ€”and the Ones We Need to Bury
  • The 10 Best Hidden Horror Gems (According to Celtx)


Author

  • Natasha Stares

    Natasha is a UK-based freelance screenwriter and script editor with a love for sci-fi. In 2022 she recently placed in the Screenwriters' Network Short Film Screenplay Competition and the Golden Short Film Festivals. When not at her desk, you'll find her at the theater, or walking around the English countryside (even in the notorious British weather)

    View all posts
character developmenthorrorhorror movieshorror scriptscreenplay

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