James Corden (Peter Rabbit), Rose Byrne (Bea), Domhnall Gleeson (Mr. Thomas McGregor), David Oyelowo (Nigel Basil-Jones), Lennie James (Barnabas), Tim Minchin (Busker K. Bushy, Esq.), Colin Moody (Benjamin Bunny), Margot Robbie (The Narrator), Elizabeth Debicki (Mopsy), Hayley Atwell (Mittens), Aimee Horne (Cotton-Tail), Tara Morice (Officiant), Tom Golding (Carlos (Aide)), Shona Tough (Mail Carrier (Moira)), Andy Gathergood (Mail Carrier (Matthias)), Dave Lawson (Chris), Dalip Sondhi (), Megan Smart (), Taylor Ferguson ()