Brennan Keel Cook on Character Dynamics and Filming “Do Not Enter”

The supernatural horror-thriller “Do Not Enter” is set to arrive in theaters on March 20, 2026, bringing a modern twist to the urban exploration genre. At a recent red carpet screening in Los Angeles, the cast and crew gathered to discuss the intense filming process and the themes of fear that drive the narrative. Brennan Keel Cook, who portrays Mack in the film, was initially drawn to the project because of its source material, the novel Creepers by David Morrell.

Directed by Marc Klasfeld the film follows a group of thrill-seekers who find themselves trapped in the abandoned Paragon Hotel in New Jersey while attempting to livestream their latest stunt for social media fame. Journalists Josh LaCount (Temple of Geek) and Hannah Altman (Paranormal Lounge) caught up with the cast and crew at the Los Angeles premiere to discuss the making of this R-rated nightmare.

Brennan Keel Cook on Character and Source Material

As a self-described genre enthusiast, he appreciated the script’s approach, likening the story to a version of The Goonies reimagined for the social media era. In discussing his role, Cook noted that he played the “tweaker” of the group, which required a careful acting balance to ensure he did not overplay or underplay the character’s specific energy.

LOS ANGELES, CALIFORNIA – MARCH 18: Marc Klasfeld, Jake Manley, Brennan Keel Cook, Adeline Rudolph, Francesca Reale, Shane Paul McGhie, Kai Caster and Jordan Schur attends the “Do Not Enter” Special Screening at Westwood iPic Theaters on March 18, 2026 in Los Angeles, California. (Photo by Tommaso Boddi/Getty Images for Lionsgate)

The filming process presented several unique environmental challenges for the actor. The project was shot four years ago in Bulgaria during the height of the COVID-19 pandemic, which Cook described as an intense experience involving being on foreign soil on the other side of the world. Additionally, the production relied heavily on blue screens for its supernatural elements, forcing Cook to “dip into his imaginary circumstances” more often than not while on set.

Shifting Perceptions of Fear

When asked if the film changed his real-life perspective on fear and risk, Cook admitted that the experience had a lasting impact on his comfort levels with certain environments. He joked that as a result of working on the film, he has no plans to enter any abandoned hotels in the near future. Despite the intensity of the role and the challenging production conditions, he ultimately summarized the film in a single word: “fun”.

Do Not Enter” features an ensemble cast including Jake Manley, Adeline Rudolph, Francesca Reale, Shane Paul McGhie, Kai Caster, and Javier Botet. It hits theaters and on digital this Friday, March 20, 2026. Based on the acclaimed novel Creepers by David Morrell, the film follows a group of thrill-seekers whose livestream from the abandoned Paragon Hotel turns into a fight for survival against supernatural forces.

Josh LaCount

Josh is a narrative filmmaker, writer, and cinematographer with a deep love for sci-fi, film scores, and character-driven storytelling. He’s drawn to stories that create lingering, emotional moments - the kind that stay with you long after the film ends. A Doctor Who fan and pop-culture enthusiast, Josh loves exploring movies through both conversation and creation, from acting and directing to camera and story development.

More From Author

“Do Not Enter” Director Marc Klasfeld on the Paragon Hotel

“Do Not Enter” on Kai Caster on the Filming of the New Horror-Adventure

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.