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

Will Gluck (Writer), Rob Lieber (Writer), Peter Menzies Jr. (Director of Photography), Will Gluck (Producer), Zareh Nalbandian (Producer), Christian Gazal (Editor), Brian Lynch (Associate Producer) more..., David Williams (Lead Animator), Sara Desmond (Unit Production Manager), Chris Upson (Visual Effects), Rob Coleman (Animation Director), Lawrence Woodward (Stunt Coordinator), Michael Furniss (Visual Effects), P.J. Voeten (First Assistant Director), Danielle Blake (Second Second Assistant Director), Andrew Power (Second Unit First Assistant Director), Zoe Liang (Second Assistant Director), Barney Shakespeare (Third Assistant Director), Christian Otty (Second Assistant Director), Christine Luby (Third Assistant Director), Xander Collier (Assistant Director), Richard Bradshaw ("B" Camera Operator), Matt Windon (First Assistant "A" Camera), Gerard Maher (First Assistant "B" Camera), David Elmes (First Assistant "A" Camera), Frank Flick ("A" Camera Operator), Jack Mayo (First Assistant "B" Camera), Rebecca Crowe (First Assistant Camera), Ian Jackson (Second Assistant "A" Camera), David Churchyard (First Assistant "B" Camera), Andrew Jones (Second Assistant "B" Camera), Lorena Pagés (Second Assistant Camera), Jac Norton (Second Assistant "B" Camera), Inaki De Ubago (Second Assistant Camera), Naomi Sharp (Second Assistant "A" Camera), Adrien Seffrin (First Assistant Camera), Simon Dunn (Second Assistant "A" Camera), Charmian Gradwell (Dialect Coach), Sally Hague (Dialect Coach), Dominic Lewis (Original Music Composer) and others.