New Line’s comedy “Fist Fight,” starring Ice Cube and Charlie Day, has gained momentum with TV director Richie Keen in talks to helm the movie.

New Line set up “Fist Fight” in late 2013 with 21 Laps’ Shawn Levy and Dan Cohen producing with Billy Rosenberg and Max Greenfield. The script by Van Robichaux and Evan Susser centers on a pair of high school teachers. Cube’s character challenges another instructor, played by Day, to a fight after suspecting his colleague is trying to get him fired.

New Line is aiming to go into production in September. Sam Brown and Dave Neustadter are the studio’s execs on the project.

Keen’s credits include Showtime’s “Shameless” and FX’s “It’s Always Sunny In Philadelphia,” which stars Day. He’s repped by CAA and Lonestar Entertainment.

Cube is producing and starring in MGM’s “Barbershop 3,” due out in February. Day portrays a river-rafting guide in New Line’s upcoming “Vacation.”

The news was first reported by Deadline.