Rabe will also be a producer of the romantic comedy, which is penned by her father, Tony Award-winning playwright David Rabe. Rodrigo Garcia ("Albert Nobbs") will direct.
Lynn Hendee and Robert Chartoff are also producers of "We're Just Married."
Lily Rabe was nominated for a Tony Award in 2011 for her performance in The Merchant of Venice. Her other Broadway credits include Steel Magnolias, Heartbreak House and The American Plan, and she is known for her work on "American Horror Story."
David Rabe's 1972 play Sticks and Bones received the Tony Award for Best Play. He is also the author of Boom Boom Boom, Streamers, The Basic Training of Pavlo Hummel and Hurlyburly.