James Corden
Peter Rabbit (voice)

Rose Byrne
Bea

Domhnall Gleeson
Mr. Thomas McGregor

David Oyelowo
Nigel Basil-Jones

Margot Robbie
Flopsy Rabbit / The Narrator (voice)

Elizabeth Debicki
Mopsy Rabbit (voice)

Aimee Horne
Cottontail Rabbit (voice)

Colin Moody
Benjamin Bunny (voice)

Lennie James
Barnabas (voice)

Damon Herriman
Tom Kitten (voice)

Hayley Atwell
Mittens (voice)

Rupert Degas
Samuel Whiskers / Little Pig Robinson (voice)

Sia
Mrs. Tiggy-Winkle (voice)

Sam Neill
Tommy Brock (voice)

Ewen Leslie
Pigling Bland (voice)

David Wenham
Johnny Town-Mouse (voice)

Tim Minchin
Busker K. Bushy, Esq (voice)

Tara Morice
Officiant

Dave Lawson
Chris

Alex Blias
Phil

Jude Hyland
Toy Shop Young Boy