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