Frank Grillo says Universal did not have a script for “Purge 3” when he was asked to reprise his role as the Sergeant. Director James DeMonaco reportedly wrote the story revolving around the character after Grillo signed on the movie.

“They didn’t have a script. They just called and said, ‘Would you be interested if we had a great script?” Grillo told  Slash Film. “DeMonaco called and said, ‘If it’s with you, I’ll do it.’ He and Universal came up with this; he’s wonderful at this. He wrote a script. I didn’t think it would be better, but I think it’s better than the second one.”

The 50-year-old actor also revealed that he had no idea about the sequel when he did “The Purge: Anarchy.” He reportedly did the film as an independent feature as he loved the script.

“I love James DeMonaco and I’m a big fan of that genre of movie. The kind of action-thriller ‘70s B movie, if done right, is my kind of movie, is why I used to go to the movies when I was a kid,” he said.

Grillo's character is expected to be the main focus of “Purge 3.” In “The Purge: Anarchy,” his character is in a search of the man who killed his son during the Purge. During his search, he helps a group of innocent people who become homeless because of the event. This makes him question his own quest for vengeance. The actor said in his interview that people loved his character and he is happy to reprise his role.

The script of the film is being kept under wraps, and the shooting begins next month, Variety reported. Michael Bay and Jason Blum are the producers, and Sharon Lomofsky is in charge of the production design. The rest of the cast has not been confirmed.

“Purge 3” opens July 15, 2016.