Chris Evans (Narrator), Michelle Monaghan (Her), Topher Grace (Scott), Aubrey Plaza (Mallory), Luke Wilson (Samson), Martin Starr (Lyle), Anthony Mackie (Bryan) more..., Ioan Gruffudd (Stuffy), Philip Baker Hall (Granddad), Patrick Warburton (Dick), Ashley French (Ashley Tisdale), Matthew Morrison (Matthew Morrison), Jaeden Martell (6 Year Old Me), Fabianne Therese (College Girl), Gerry Bednob (Cabbie / Gabriel), Beverly D'Angelo (Lyle's Girlfriend), Kyle Mooney (Other Dude), Scott Evans (Blissful Boy), Brenda Schmid (Blissful Girl), Sarah Dumont (Cute Girl), Mikaela Hoover (Lacey), Devon Ogden (Sadie)

Chris Shafer (Screenplay), Paul Vicknair (Screenplay), Chris Evans (Executive Producer), Nicolas Chartier (Producer), Craig J. Flores (Producer), McG (Producer), Mary Viola (Producer) more..., Catherine Haight (Editor), Kelley Cribben (Post Production Supervisor), Justine Arteta (Casting), Vincent Guisetti (Foley Artist), Jon Poll (Co-Executive Producer), Patrick Lumb (Production Design), Patrick Lumb (Set Dresser), Tami Treadwell (ADR Mixer), John C. Hartigan (Special Effects Coordinator), Andy Cheng (Stunt Coordinator), Jeff Cutter (Director of Photography), Ron Bedrosian (ADR Mixer), Beth Pasternak (Costume Designer), Kim Davis-Wagner (Casting), Bruce Wayne Gillies (Unit Production Manager), Bruce Wayne Gillies (Line Producer), Nicolas Chartier (Executive Producer), Tom Paul (Sound Re-Recording Mixer), Tim Song Jones (Boom Operator), G.W. Pope III (Foley Artist), Justin Reardon (Storyboard Artist), Chris Shafer (Co-Producer), Paul Vicknair (Co-Producer), Chad J. Hughes (Supervising Sound Effects Editor), Debbie Travis (Key Costumer), Geordy Sincavage (Foley Mixer), Lisa Clark (Set Decoration), Sean Garnhart (Sound Re-Recording Mixer), Hana Rausalova (Costume Supervisor), Steve Constancio (Set Costumer), Greg Steele (ADR Mixer), Pawel Wdowczak (Sound Mixer), Timothy Roarke (Camera Operator) and others.