Benson confirmed the news on Instagram, writing, "Very excited for this one!!!!"
18 & Over is a pandemic-inspired slasher film centering on how quarantine leads to a night of terror. Giannopolous directed the movie, which features a score by G-Eazy.
"After deciding to shoot this film in the middle of the pandemic, we wanted to make something that would be fun but still a terrifying slasher for audiences during these tough times," Giannopolous said in a statement. "A film relevant to today's issues of a global pandemic, reality shows, isolation, Only Fans, and obsession."
Giannopolous and Benson previously collaborated on Giannopolous' directorial debut, The Birthday Cake.
Benson is known for playing Hanna Marin on the Freeform series Pretty Little Liars, which ended in 2017. She most recently starred in the 2018 film Her Smell.
Copyright 2021 United Press International, Inc. (UPI). Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI's prior written consent.