Ensemble family comedy with an all-star cast headed by Robert De Niro, Diane Keaton, Susan Sarandon, Katherine Heigl, Amanda Seyfried, Robin Williams, Ben Barnes and Topher Grace. Don (De Niro) and Ellie (Keaton) are a long-divorced middle-aged couple who are forced by circumstance to pretend that they are still happily married as they attend their son's wedding. As the ramifications of their elaborate hoax unfold among their family and friends, a poignantly funny story emerges about the comedy and complexity of the tangled ties that bind.