EXCLUSIVE: More comedy names are joining the sprawling cast of Flock Of Dudes, the Kilburn Media and Major Motion Picture, LTD pic about a thirtysomething (Whitney‘s Chris D’elia) who decides to “break up” with his best buds in order to finally grow up. New Girl‘s Hannah Simone and comedians Marc Maron and Jeff Ross are the latest additions to the production currently filming in LA under helmer Bob Castrone, who makes his directorial debut. Castrone co-wrote with partners Brian Levin and Jason Zumwalt of The Post Show, which aired on TBS’s comedy site Super Deluxe. Mark Manuel’s Kilburn Media will produce and finance the comedy. Cast also includes Hilary Duff, Skylar Astin (Pitch Perfect), Bryan Greenberg (HBO’s How to Make it in America), Eric Andre, Brett Gelman, Hannibal Buress (30 Rock), Tim Simons (Veep), Bryan Callen, Jamie Chung (The Hangover Part II, Sin City: A Dame To Kill For), Kelen Coleman (Newsroom), Kumail Nanjiani (The Five-Year Engagement), and Ray Liotta. Glee‘s Lea Michele was poised to join former Spring Awakening co-star Astin in the pic before Duff stepped into her role.Aaron Kaufman is producing through his new Major Motion Picture, LTD along with Ted O’Neal, Brian Levin, and Kilburn Media’s Mark Manuel. Levity Entertainment Group’s Itay Reiss, manager of The Post Show, is aboard as exec producer. Talia Osteen and Christopher Legget will co-produce for Major Motion Pictures, LTD. Simone is repped by Gersh and Alpita Patel Management. Maron is repped by WME, Olivia Wingate Artists, and Schreck Rose Dapello & Adams. Ross is repped by WME, Thruline Entertainment, and Bloom Hergott Diemer Rosenthal Laviolette Feldman Schenkman & Goodman. WME’s Graham Taylor is handling domestic rights on the pic.