Domhnall Gleeson
Alan Alexander Milne / Blue
Margot Robbie
Daphne Milne
Will Tilston
Christopher Robin Milne / Billy Moon
Stanley Hamlin
Christopher Robin Milne (Baby)
Dexter Hyman
Christopher Robin Milne (Kid)
Sonny Hyman
Christopher Robin Milne (Kid)
Alex Lawther
Christopher Robin Milne (Teen)
Kelly Macdonald
Olive Rand / Nou
Phoebe Waller-Bridge
Mary Brown
Vicki Pepperdine
Betty
Stephen Campbell Moore
Ernest H. Shepard
Richard McCabe
Rupert
Geraldine Somerville
Lady O
Nico Mirallegro
Cooper
Shaun Dingwall
Alfred Brockwell
Dan MacKay
Bob Clerkwell
Mossie Smith
Sharon the Midwife
Tommy Rodger
Douglas Minor
Robert Portal
Headmaster
Allegra Marland
Fan
Nicholas Richardson
Newspaper Man
Jim Cartwright
Military Medic
Vincent Finch
Big Boy
Richard Clifford
Toy Shop Manager
Simon Connolly
Radio Host