Jamie Dornan (‘Anthropoid,’ ‘Fifty Shades of Grey’), ‘Rogue One: A Star Wars Story’ actor Ben Mendelsohn, and sisters Jemima Kirke (‘Girls’) and Lola Kirke (‘Mozart in the Jungle’) have joined the cast of the indie drama ‘Untogether.’

Per THR, ‘Untogether’ follows two sisters and their relationships: Andrea (Jemima Kirke), a former teen prodigy turned heroin addict who is having an affair with a successful writer (Dornan); and her younger sister Tara (Lola Kirke), who finds her solid relationship with her older boyfriend (Mendelsohn) shaken when she is drawn to a charismatic rabbi with an even larger age gap.

The indie marks the directorial debut of best-selling author Emma Forrest, who will be helming her own screenplay. Scott LaStaiti, Luke Daniels, and Brandon K. Hogan are on board to produce, with production slated for next month.