When their adopted son (Ben Barnes) is about to get married, a long divorced couple (Robert De Niro, Diane Keaton) are forced to pretend they are still married to appease the birth mother (Patricia Rae), a conservative Catholic who does not believe in divorce, who will be coming from South America for the wedding. This does not sit well with the father's live in girlfriend (Susan Sarandon). Based on the 2006 French comedy MON FRERE SE MARIE (which to my knowledge never got a U.S. release), the director Justin Zackham (who also wrote the screenplay) has concocted a lightweight, generally amusing dysfunctional family comedy. There's nothing new here but Zackham manages to insert some strong zingers amongst the usual gags. Best of all, it allows a marvelous group of talents to strut their stuff. De Niro, Keaton and Sarandon bounce off each other like the old pros they are but Katherine Heigl, a relatively restrained Robin Williams and Christine Ebersole get to shine too. With Amanda Seyfried as the bride, Topher Grace, David Rasche and Ana Ayora.