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