To the amusement of their adult children and friends, long-divorced couple Don and Ellie Griffin are forced to play the happy couple for the sake of their adopted son's wedding after his ultra conservative Catholic biological mother unexpectedly decides to fly halfway across the world to attend. With all of the wedding guests looking on, the Griffins are hilariously forced to confront their past, present and future - and hopefully avoid killing each other in the process.
Robert De Niro
as Don Griffin
Diane Keaton
as Ellie Griffin
Ben Barnes
as Alejandro 'Alex' Soto Griffin
Amanda Seyfried
as Missy O'Connor
Susan Sarandon
as Beatrice 'Bebe' McBride
Katherine Heigl
as Lyla Griffin
Topher Grace
as Jared Griffin
Christine Ebersole
as Muffin O'Connor
David Rasche
as Barry O'Connor
Patricia Rae
as Madonna Soto
Ana Ayora
as Nuria Soto
Robin Williams
as Father Monaghan
