The Warner Bros. film features two boxers -- played by Stallone and De Niro -- who are brought out of retirement 50 years after their last fight for a final match. Kevin Hart joins the cast as a fight promoter, the magazine reported.
Pete Segel will direct, Tim Kelleher wrote the screenplay and Doug Ellin did a script polish. Producers are Billy Gerber and Mark Steven Johnson.
Swim Week Miami Beach 2014 [PHOTOS]