Ben Whishaw
Paddington (voice)
Hugh Bonneville
Henry Brown
Madeleine Harris
Judy Brown
Samuel Joslin
Jonathan Brown
Imelda Staunton
Aunt Lucy (voice)
Peter Capaldi
Reginald Curry
Michael Gambon
Uncle Pastuzo (voice)
Jim Broadbent
Samuel Gruber
Madeleine Worrall
Agatha Clyde
Tim Downie
Montgomery Clyde
Jonathan Derbyshire
Master Gruber
Mary Roscoe
Master Gruber's Aunt
Lottie Steer
Young Millicent
Alice Lowe
Geographers' Guild Receptionist
Will Smith
Geographer (Present Day)
Toby Williams
Geographer (Present Day)
Catherine Shepherd
Geographer (Present Day)
Sean Bridgeman
Morgan Clyde
Cleo Sylvestre
Marjorie Clyde
Geoffrey Palmer
Head Geographer
Gus Brown
Second Geographer
Rufus Jones
Third Geographer
Kenneth Hadley
Fourth Geographer
David McKail
Fifth Geographer
James Bachman
Sixth Geographer
Javier Marzan
Buckingham Palace Sentry
Llewella Gideon
Class Teacher
Justin Edwards
Desk Sergeant
Michael Bond
Kindly Gentleman
Steve Edge
Natural History Museum Security Guard
Steve Oram
Paddington Station Security Guard
Tom Meeten
Paddington Station Security Guard
Hamish McColl
Petting Zoo Keeper
Theresa Watson
Stenographer
Eddie Nestor
Underground Ticket Inspector
George Newton
Angel (uncredited)
Alexander Bracq
Commuter #1 (uncredited)
Ancuta Breaban
Commuter #2 (uncredited)
Faith Elizabeth
Commuter #3 (uncredited)
Barrie Martin
Commuter #4 (uncredited)
Stuart Matthews
Commuter #5 (uncredited)
Fabio Vollono
Commuter #7 (uncredited)
Julie Vollono
Commuter #8 (uncredited)
Matthew David McCarthy
Docker (uncredited)
Denis Khoroshko
Immigrant (uncredited)
Jack Philips
Market Stall Owner (uncredited)
Asim Chaudhry
Security Guard (uncredited)
Nigel Genis
Station Blocker (uncredited)
Jim Lawrence
Trader (uncredited)
Vic Waghorn
Additional Voices (voice) (uncredited)