EXCLUSIVE: The ensemble relationship drama is already filming in New York under helmer Ryan Piers Williams (The Dry Land). Amber Tamblyn, hot off her CBS pilot The Anatomy Of Violence, joins America Ferrera, Common, Melonie Diaz, Jon Paul Phillips, Dree Hemingway, Ann Dowd, Adam Rapp, Maria Dizzia, and David Harbour in the drama. She’ll play Stacey, a close friend of Silvia (Ferrera) and Mark (Williams) and partner to Tessa (Sue Jean Kim), who has her own demons to battle following her mother’s death. Ferrera and Williams are producing X/Y alongside Thomas B. Fore, Jason Michael Berman, and Kwesi Collisson. Mark G. Mathis, Margo Johnston, Dori A. Sperko, Paull Cho, Todd Feuer, Mike Feuer, Jason Silverman, Caroline Kaplan and Kim Gillingham are exec producing. Tamblyn is repped by UTA, Hyler Management and Sloane, Offer, Weber and Dern, LLP. The House, M.D. alum most recently turned in a cameo in Quentin Tarantino’s Django Unchained.