James Corden
Role: Peter Rabbit (voice)
Rose Byrne
Role: Beatrix 'Bea' Potter / Jemima Puddle-Duck (voice)
Domhnall Gleeson
Role: Thomas McGregor / Mr. Jeremy Fisher (voice)
Margot Robbie
Role: Flopsy Rabbit / Narrator (voice)
Elizabeth Debicki
Role: Mopsy Rabbit (voice)
Daisy Ridley
Role: Cottontail Rabbit (voice)
Colin Moody
Role: Benjamin Bunny (voice)
Sam Neill
Role: Mr. McGregor / Tommy Brock (voice)
Marianne Jean-Baptiste
Role: Harrods General Manager
Felix Williamson
Role: Derek
Sia
Role: Mrs. Tiggy-Winkle (voice)
Fayssal Bazzi
Role: Mr. Tod (voice)
Ewen Leslie
Role: Pigling Bland (voice)
Christian Gazal
Role: Felix D'eer (voice)
Rachel Ward
Role: Josephine Rabbit (voice)
Bryan Brown
Role: Mr. Rabbit (voice)
David Wenham
Role: Johnny Town-Mouse (voice)
Will Reichelt
Role: JW Rooster II (voice)
Ming-Zhu Hii
Role: Sarabeth
Lance Kerfuffle
Role: J. David Scarfington
Terenia Edwards
Role: Siobhan
Vauxhall Jermaine
Role: Harrods Security
Tom Greaves
Role: Harrods Security
Jessica Friedman
Role: Singing Sparrow (voice)
Shana Halligan
Role: Singing Sparrow (voice)
Katharine Hoye
Role: Singing Sparrow (voice)
Chris Mann
Role: Singing Sparrow (voice)
Chad Reisser
Role: Singing Sparrow (voice)
Fletcher Sheridan
Role: Singing Sparrow (voice)
Alexandra Gluck
Role: London Street Rat (voice)
Taryn Gluck
Role: London Street Rat (voice)
Grant Crookes
Role: Passerby (uncredited)
Gareth Davies
Role: Bannerman
Karl Farrer
Role: Train Commuter (uncredited)
Philippe Lacheau
Role: (voice) (uncredited)
Élodie Fontan
Role: (voice) (uncredited)
Julien Arruti
Role: (voice) (uncredited)
