Larson Feeds "Don Jon's Addiction"

Brie Larson has been cast as Joseph Gordon-Levitt's sister in his dark comedy directorial debut "Don Jon's Addiction."says Variety.

In the film--JGL will portray a modern-day Don Juan who attempts to become less of a "selfish d**k" throughout the course of the film.

Julianne Moore will play an unlikely mentor to his character. Scarlett Johansson has signed on to play the female lead, with an additional actresses expected to be cast soon playing other lovers. Tony Danza is set to play JGL's dad. Rob Brown also stars.

Ram Bergman will produce the pic.

Production is underway.

Larson will stay busy after "Addiction" with roles in Peter Bogdanovich's "Squirrel To The Nuts," "Relanxious" with Olivia Wilde and Jason Sudeikis, and "The Spectacular Now" with Shailene Woodley and Miles Teller, all on her plate.