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)

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

Gareth Davies

Bannerman

Vauxhall Jermaine

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)