James Corden (Peter Rabbit (voice)), Rose Byrne (Beatrix 'Bea' Potter / Jemima Puddle-Duck (voice)), Margot Robbie (Flopsy Rabbit / Narrator (voice)), Sam Neill (Mr. McGregor / Tommy Brock (voice)), Domhnall Gleeson (Thomas McGregor / Mr. Jeremy Fisher (voice)), Daisy Ridley (Cottontail Rabbit (voice)), Elizabeth Debicki (Mopsy Rabbit (voice)) more..., Sia (Mrs. Tiggy-Winkle (voice)), Felix Williamson (Derek), Fayssal Bazzi (Mr. Tod (voice)), Ewen Leslie (Pigling Bland (voice)), Rachel Ward (Josephine Rabbit (voice)), Bryan Brown (Mr. Rabbit (voice)), David Wenham (Johnny Town-Mouse (voice)), Fletcher Sheridan (Singing Sparrow (voice)), Marianne Jean-Baptiste (General Manager), Terenia Edwards (Siobhan), Colin Moody (Benjamin Bunny (voice)), Christian Gazal (Felix D'eer (voice)), Alexandra Gluck (London Street Rat (voice)), Taryn Gluck (London Street Rat (voice)), Will Reichelt (JW Rooster II (voice)), Jessica Freedman (Singing Sparrow (voice)), Shana Halligan (Singing Sparrow (voice)), Katharine Hoye (Singing Sparrow (voice)), Chris Mann (Singing Sparrow (voice)), Chad Reisser (Singing Sparrow (voice)), Vauxhall Jermaine (Jackson)

Will Gluck (Writer), Beatrix Potter (Book), Dominic Lewis (Music), Rob Lieber (Writer), Peter Menzies Jr. (Director of Photography), Will Gluck (Producer), Zareh Nalbandian (Producer) more..., Christian Gazal (Editor), Brian Lynch (Associate Producer), David Williams (Lead Animator), Sara Desmond (Unit Production Manager), Chris Upson (Visual Effects), Rob Coleman (Animation Director), Rostam Batmanglij (Music), Lawrence Woodward (Stunt Coordinator),