It’s a movie about the real boxer who inspired the ‘Rocky’ movies.

“You don’t know me.

That boxer is Chuck Wepner, once the Heavyweight Champion of New Jersey.

THE BLEEDER

Credit: Sarah Shatz/IFC Films

“Then some guy named Stallone wrote a screenplay inspired by me.

I was like, ‘What?'”

Schreiber-as-Chuck recalls in the new clip.

Mad Menalum andThe Handmaid’s Talestar Elisabeth Moss also features alongside Ron Perlman and Jim Gaffigan in the film.

Morgan Spector is spotted in the trailer as Sylvester Stallone, presenting the script forRocky.

Chuckwill hit theaters on May 5.

Watch the trailer above.