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