HOLLYWOOD — Director Noah Baumbach has set a trio of thesps to star alongside Ben Stiller in the dramedy “Greenberg” for Focus Features.Rhys Ifans, Brie Larson and Juno Temple have joined the pic, which Scott Rudin is producing. Penned by Baumbach, story centers on a New Yorker (Stiller) who moves to Los Angeles to housesit for his brother and figure out his life. He ends up having a relationship with his brother’s assistant (Greta Gerwig). Ifans will play Stiller’s best friend, who is going through a divorce. Larson will play Stiller’s college-age temptation, and Temple will portray her buddy. Shooting will begin later this month.