James Corden

Character: Peter Rabbit (voice)

Rose Byrne

Character: Beatrix 'Bea' Potter / Jemima Puddle-Duck (voice)

Domhnall Gleeson

Character: Thomas McGregor / Mr. Jeremy Fisher (voice)

Margot Robbie

Character: Flopsy Rabbit / Narrator (voice)

Elizabeth Debicki

Character: Mopsy Rabbit (voice)

Daisy Ridley

Character: Cottontail Rabbit (voice)

Colin Moody

Character: Benjamin Bunny (voice)

Sam Neill

Character: Mr. McGregor / Tommy Brock (voice)

Marianne Jean-Baptiste

Character: Harrods General Manager

Felix Williamson

Character: Derek

Sia

Character: Mrs. Tiggy-Winkle (voice)

Fayssal Bazzi

Character: Mr. Tod (voice)

Ewen Leslie

Character: Pigling Bland (voice)

Christian Gazal

Character: Felix D'eer (voice)

Rachel Ward

Character: Josephine Rabbit (voice)

Bryan Brown

Character: Mr. Rabbit (voice)

David Wenham

Character: Johnny Town-Mouse (voice)

Will Reichelt

Character: JW Rooster II (voice)

Ming-Zhu Hii

Character: Sarabeth

Lance Kerfuffle

Character: J. David Scarfington

Natalie Dew

Character: Janelle

Terenia Edwards

Character: Siobhan

Vauxhall Jermaine

Character: Harrods Security

Tom Greaves

Character: Harrods Security

Sacha Horler

Character: Betty

Alex Blias

Character: Phil

Dave Lawson

Character: Chris

Sam Haft

Character: Postman

Jessica Friedman

Character: Singing Sparrow (voice)

Shana Halligan

Character: Singing Sparrow (voice)

Katharine Hoye

Character: Singing Sparrow (voice)

Chris Mann

Character: Singing Sparrow (voice)

Chad Reisser

Character: Singing Sparrow (voice)

Fletcher Sheridan

Character: Singing Sparrow (voice)

Alexandra Gluck

Character: London Street Rat (voice)

Taryn Gluck

Character: London Street Rat (voice)

Grant Crookes

Character: Passerby (uncredited)

Gareth Davies

Character: Bannerman

Karl Farrer

Character: Train Commuter (uncredited)