Lionsgate has acquired U.S. and UK rights to the ensemble comedy The Big Wedding, and has set an Oct. 19, 2012 release for the Nu Image/Millennium Films pic that stars Robert De Niro and Diane Keaton as a long-divorced couple that fakes marriage when the family is reunited for a big wedding. Susan Sarandon, Katherine Heigl, Amanda Seyfried, Robin Williams, Ben Barnes and Topher Grace are in the film, which is shooting in Connecticut. The Bucket List scribe Justin Zackham is directing.