Ryan Reynolds Jerry Hickfang / Mr. Whiskers (voice) / Bosco (voice) / Deer (voice) / Bunny Monkey (voice)
Gemma Arterton Fiona
Anna Kendrick Lisa
Adi Shankar John, Producer
Sam Spruell Dave
Stanley Townsend Sheriff Weinbacher
Roy Lee Producer
Jacki Weaver Dr. Warren
Paul Chahidi Dennis Kowalski
Gulliver McGrath Jerry (12 years old)
Paul Brightwell Jerry's Stepfather
Christoph Fisser Executive Producer
Carl Woebcken Executive Producer
Michael R. Perry Writer
Larry Blake ADR Mixer
Ella Smith Alison
John Powers Middleton Executive Producer
Michael Pink Jesus
Henning Molfenter Executive Producer
Marco Mehlitz Co-Producer
Maxime Alexandre Director of Photography
Cathy Schulman Executive Producer
Nathalie Tissier Key Makeup Artist, Makeup Designer
Udo Kramer Production Design
Marjane Satrapi Director
Matthew Rhodes Producer
Elika Portnoy Executive Producer
Kai Fung Rieck Chinese Elvis
Douglas Saylor Jr. Executive Producer
Spencer Silna Producer
Mathias Schwerbrock Line Producer
Stéphane Roche Editor
Valerie Koch Jerry's Mother
Ricardia Bramley Sheila Hammer
Alex Foster Co-Producer
Bettina Helmi Costume Design
Alessa Kordeck Sheryl
Nicole Barton Co-Producer
Alex Tondowski Tom
Adam C. Stone Executive Producer
Thomas Nickel Co-Producer
Olivier Bernet Original Music Composer