The Boy Downstairs will be released in theaters early next year.
Aspiring writer Diana (Mamet in her first film role since the end of HBO’s hit “Girls”) returns to New York City after a few years living in London and finds what seems to be the perfect Brooklyn apartment to start fresh. However, on the first night in her new home she discovers that her ex-boyfriend Ben (Matthew Shear, Mistress America) lives in the apartment downstairs. With support from her affable landlady Amy (Deirdre O’Connell) and her best friend Gabby (Diana Irvine), Diana proclaims her intentions for a cordial friendship, but as the story progresses and old wounds are reopened, she is forced to confront the true nature of her feelings.