Domhnall Gleeson
Alan Alexander Milne / Blue

Margot Robbie
Daphne Milne

Will Tilston
Christopher Robin Milne / Billy Moon

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

Richard Clifford
Toy Shop Manager

Simon Connolly
Radio Host

Richard Dixon
MC at Pageant

Ann Thwaite
Pageant Dignitary

Sarah Jayne Butler
Winning Mum

Victoria Bavister
Mother at Zoo

Simon Williams
Zoo Director

Nick Blakeley
Zoo Photographer

Mark Tandy
Portrait Photographer

Bentley Kalu
American Police

Rolan Bell
American Police

Mark McKerracher
Groupie

Jason Matthewson
Theatre Patron

Adam Lazarus
Theatre Goer

Gintare Beinoraviciute
Party Guest

Callum Forman
Party Guest

Gemma Wilks
Party Guest

Honey Holmes
Party Guest

Ceri Jerome
Dancer