Mafia Mamma and Knives Ou t star Toni Collette and Odessa Young ( The Staircase, Mothering Sunday, Shirley ) have signed to co-star in writer and director Nathan Silver’s twisted revenge thriller The Prima Donna . Collette and Young previously worked together on HBO’s award-winning series The Staircase . The drama revolves around dysfunctional family dynamics, the dangers of ambition, and the lengths we will go to make our mark on the world. Set in contemporary Rome, Collette will play a legendary opera diva who is about to step into the role of a lifetime just as her estranged daughter (Young) shows up at her doorstep, right out of rehab. An aspiring opera singer herself, the daughter summons up the courage to ask to be her mother’s understudy. When her mother callously dismisses the suggestion, she snaps and starts mulling the ultimate revenge, igniting a cut-throat battle of wills. Silver, whose previous credits include Thirst Street, Uncertain … [Read more...] about Toni Collette & Odessa Young Reunite On Nathan Silver’s Revenge Thriller ‘The Prima Donna’; Cornerstone Launching At The EFM