James Corden as Peter Rabbit (Voice)
Fayssal Bazzi as Mr. Tod (Voice)
Domhnall Gleeson as Mr. Jeremy Fisher (Voice)
Sia as Mrs. Tiggy-Winkle (Voice)
Colin Moody as Benjamin Bunny (Voice)
Sam Neill as Old Mr. McGregor
Margot Robbie as Flopsy (Voice)
Elizabeth Debicki as Mopsy (Voice)
Daisy Ridley as Cotton-Tail (Voice)
Christian Gazal as Felix D'eer (Voice)
Rose Byrne as Jemima Puddle-Duck (Voice)
Sam Neill as Tommy Brock (Voice)
Ewen Leslie as Pigling Bland (Voice)
Domhnall Gleeson as Mr. Thomas McGregor
Natalie Dew as Harrods Worker - Janelle
Terenia Edwards as Harrods Worker - Siobhan
Marianne Jean-Baptiste as General Manager (as Marianne Jean Baptiste)
Gareth Davies as Bannerman
Vauxhall Jermaine as Harrods Security
Tom Greaves as Harrods Security
Alexandra Gluck as London Street Rat
Taryn Gluck as London Street Rat
Sacha Horler as Taxi Driver - Betty
Will Reichelt as JW Rooster II (Voice)
Alex Blias as Hardware Clerk - Phil
Dave Lawson as Hardware Clerk - Chris
Felix Williamson as Derek
Rachel Ward as Peter's Mother (Voice)
Bryan Brown as Peter's Father (Voice)
Lance Kerfuffle as J. David Scarfington
David Wenham as Johnny Town-Mouse (Voice)
Jyla Mabaso as Small Girl
Jessica Freedman as Singing Sparrow (Voice)
Shana Halligan as Singing Sparrow (Voice)
Katherine Hoye as Singing Sparrow (Voice)
Chris Mann as Singing Sparrow (Voice)
Chad Reisser as Singing Sparrow (Voice) (as Chad C. Reisser)
Fletcher Sheridan as Singing Sparrow (Voice)
Margot Robbie as The Narrator (Voice)
Jeremy Azis as Shopper #62
Jill Buchanan as Train Commuter
Grant Crookes as Passerby
Tom Dab as Tourist at Harrods
Guinevere Edwards as Shopper
Karl Farrer as Train Commuter
Sian Fleet-Milne as Posh Shopper
Ty Hurley as Tube Commuter
Akshay Mahendrakar as Posh Shopper
Harry Peek as Paddington Station Man
Amandeep Perhar as Commuter
Ellie Poussot as Backpacker
Deborah Rock as Posh Shopper
Bernardo Santos as Posh Shopper
Sonia Sarkis as Customer in Store
Emma Louise Saunders as Pretty Lady
Randall Schwerdtfeger as Paddington Station Commuter
Oksana Veber as Wealthy Customer
Bill K. Wilson as Paddington Sation Commuter Male
Miroslav Zaruba as Rich Shopper