Emma Thompson as P.L. Travers

Tom Hanks as Walt Disney

Colin Farrell as Travers Robert Goff

Paul Giamatti as Ralph

Ruth Wilson as Margaret Goff

Jason Schwartzman as Richard Sherman

Bradley Whitford as Don DaGradi

Annie Rose Buckley as Ginty

B.J. Novak as Robert Sherman

Kathy Baker as Tommie

Lily Bigham as Biddy

Melanie Paxson as Dolly

Andy McPhee as Mr. Belhatchett

Rachel Griffiths as Aunt Ellie

Ronan Vibert as Diarmuid Russell

Fuschia Sumner as Flight Attendant

David Ross Paterson as Doctor

Laura Waddell as Woman with Infant

Barbara Keegan as Flight Attendant

Steven Cabral as Bank Clerk

Jerry Hauck as Premier Emcee

Michelle Arthur as Polly

Michael Swinehart as Porter

Bob Rusch as Doorman

Paul Tassone as Refreshment Tent Man

Luke Baines as Waiter

Demetrius Grosse as Bartender

Kim D'Armond as Katie Nanna

Mia Serafino as Young Woman

Claire Bocking as Nanny Claire

Dendrie Taylor as Lillian Disney

Kristopher Kyer as Dick Van Dyke (uncredited)

Victoria Summer as Julie Andrews (uncredited)

Jaeden Bettencourt as Young Child-1906 (uncredited)