The Big Wedding (2013)

A divorced couple pretends to be married again for the sake of their adopted son in The Big Wedding (2013). Don (Robert DeNiro) and Ellie (Diane Keaton) have been divorced for many years, and Don is happily shacked up with Ellie's friend Bebe (Susan Sarandon). But when their adopted son Alejandro (Ben Barnes) tells them he never told his extremely conservative birth mother about the divorce--and could they please pretend to be married again for her sake on his wedding day?--they're right back where they used to be. Not much in the way of nudity, but good ol' Bobby De Niro, proves to be in as fine a form as ever while watching TV shirtless.