Anna Kendrick Eloise McGarry Craig Robinson Jerry Kepp June Squibb Jo Flanagan Lisa Kudrow Bina Kepp Stephen Merchant Walter Thimble Tony Revolori Renzo Eckberg Wyatt Russell Teddy Millner Amanda Crew Nikki Becky Ann Baker Carol Millner Thomas Cocquerel Huck Hayes Maria Thayer Kate Millner Andrew Daly Luke Pfaffler Andy Stahl Henry Grotsky Chris Whitley Douglas Grotsky Margo Martindale Freda Eckberg Megan Lawless Megan-Ann Sheri Mann Stewart Sherri Grotsky Tommy O'Brien Robert Vardaros (uncredited) Richard Haylor Roger Millner Carlos Aviles Jalapeño Chelle Ramos Rodriguez Bride Brad Oberhofer Wedding Singer Jay Klaitz Photographer Max Silvestri Champagne Server Nick Arapoglou Receptionist Matthew Cornwell Drunk Military Buddy Elizabeth Faith Ludlow Caterer Omer Mughal Hotel Staff Member