By Adam Markovitz
Updated March 18, 2010 at 09:55 AM EDT

Variety reports that Natalie Portman and Ashton Kutcher have signed on to star in Friends with Benefits, a romantic comedy directed by Ivan Reitman. Plot details are secret, but studio Paramount has already announced a Jan. 7, 2011 release date. Reitman, father of Oscar nominee Jason Reitman, hasn’t directed for the big screen since 2006’s My Super Ex-Girlfriend.