The pair will join Michael Gambon and Alfred Molina in the film, which centers on a married couple whose relationship is strained when one of their uncles moves in. Reilly and Letts play the married duo with Gambon starring as the uncle.
Sachs will also produce with Lucas Joaquin, Lars Knudsen and Jay Van Hoy.
Reilly starred as the female lead opposite Denzel Washington in Robert Zemeckis’ “Flight” and has wrapped on the indie pics “Innocence”, “Cavalry” and “A Single Shot”. She is repped by ICM and Troika.
Letts has written for both stage and screen, having adapted his own works for, “August: Osage County”, “Bug” and “Killer Joe”. He will also next star in the comedy “The Ellen and Ted Show”. He is repped by Abrams Artists Agency and Innovative Artists.