Bill Murray (Phil Connors), Andie MacDowell (Rita Hanson), Chris Elliott (Larry), Stephen Tobolowsky (Ned Ryerson), Brian Doyle-Murray (Buster Green), Marita Geraghty (Nancy Taylor), Angela Paton (Mme Lancaster) more..., Rick Ducommun (Gus), Rick Overton (Ralph), Robin Duke (Doris la serveuse), Carol Bivins (La présentatrice), Willie Garson (Kenny, l'assistant de Phil), Ken Hudson Campbell (L'homme dans le couloir), Les Podewell (Le vieil homme), Rod Sell (Groundhog Official), Tom Milanovich (State Trooper), John M. Watson Sr. (Le barman), Peggy Roeder (Le professeur de piano), Harold Ramis (Le neurologue), David Pasquesi (Psychiatrist), Lee Sellars (Un policier), Chet Dubowski (Félix, un gardien de la banque), C.O. Erickson (Herman, un gardien de la banque), Sandy Maschmeyer (La compagne de Phil au cinéma), Leighanne O'Neil (Une admiratrice dans la rue), Evangeline Binkley (Une spectatrice de Jeopardy!), Samuel Mages (Un spectateur de Jeopardy!), Ben Zwick (Un spectateur de Jeopardy!), Hynden Walch (Debbie), Michael Shannon (Fred), Timothy Hendrickson (Bill le serveur), Martha Webster (Alice la serveuse), Angela Gollan (L'élève de piano), Shaun Chaiyabhat (Le garçon qui tombe de l'arbre), Dianne B. Shaw (L'infirmière des urgences), Barbara Ann Grimes (Une dame au pneu crevé), Ann Heekin (Une dame au pneu crevé), Lucina Paquet (Une dame au pneu crevé), Brenda Pickleman (L'épouse de Buster), Amy Murdoch (La fille de Buster) and others.

Trevor Albert (Producer), Harold Ramis (Producer), John Bailey (Director of Photography), George Fenton (Original Music Composer), Howard Feuer (Casting), Pembroke J. Herring (Editor), Peter Landsdown Smith (Art Direction) more..., Lisa Fischer (Set Decoration), Tom Ryba (Special Effects), Cindy Marty (Sound Editor), George H. Anderson (Supervising Sound Editor), Mary Andrews (Sound Editor), Danny Rubin (Story), Steve Boyum (Stunts), Danny Rubin (Screenplay), Harold Ramis (Screenplay), C.O. Erickson (Executive Producer), David Nichols (Production Design), Jennifer Butler (Costume Design), Deborah K. Dee (Makeup Artist), Rick LeFevour (Stunt Coordinator), Dorothy J. Pearl (Makeup Artist), Jeff Atmajian (Orchestrator), Sergio Reyes (Sound Re-Recording Mixer), Gunnar Swanson (Hairstylist), Emanuel Millar (Key Hair Stylist), Art Anthony (Prosthetic Supervisor), James Lacey (Makeup Artist), Rick Lazzarini (Special Effects), Michael Butler (Costume Supervisor), Patrick Caulfield (Set Costumer), Julie Glick (Set Costumer), George DiLeonardi (Transportation Captain), Judi Townsend (Script Supervisor), Tony Ciccone (Assistant Editor), Louis Goldman (Still Photographer), James J. Murakami (Assistant Art Director), Sharon Boyle (Music Supervisor), Nicole Arbusto (Casting Assistant), Jane Brody (Local Casting) and others.