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)