Actress joins the dark comedy.

Joseph Gordon-Levitt has enlisted ‘21 Jump Street’ star Brie Larson for his directorial debut ‘Don Jon’s Addiction,’ reports Variety.

The film – penned by and starring Gordon-Levitt in the lead – follows a contemporary, porn-addicted Don Juan-type who sets out to become a less selfish person after meeting a recently widowed older woman (played by Julianne Moore).

Larson will play Gordon-Levitt’s sister in the dark comedy, which also co-stars Scarlett Johansson, Rob Brown (‘The Express’) and Tony Danza (‘Crash’).