Rollista

• Rufus Jones — Third Geographer
• Nicole Kidman — Millicent
• Peter Capaldi — Reginald Curry
• Imelda Staunton — Aunt Lucy (voice)
• Michael Gambon — Uncle Pastuzo (voice)
• Matt King — Andre the Thief
• Geoffrey Palmer — Head Geographer
• Iain Mitchell — Dog Owner
• Hamish McColl
• Ben Whishaw — Paddington (voice)
• Hugh Bonneville — Henry Brown
• Sally Hawkins — Mary Brown
• Samuel Joslin — Jonathan Brown
• Madeleine Harris — Judy Brown
• Julie Walters — Mrs. Bird
• Jim Broadbent — Samuel Gruber
• Madeleine Worrall — Agatha Clyde
• Tim Downie — Montgomery Clyde
• Simon Farnaby — Barry
• Kayvan Novak — Grant
• Matt Lucas — Joe
• Jude Wright — Tony
• Alice Lowe — Geographers' Guild Receptionist
• Will Smith — Geographer (Present Day)
• Toby Williams — Geographer (Present Day)
• Catherine Shepherd — Geographer (Present Day)
• Cleo Sylvestre — Marjorie Clyde
• Gus Brown — Second 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
• Dominic Coleman — Policeman
• Theresa Watson — Stenographer
• Ross Boatman — Trader
• Eddie Nestor — Underground Ticket Inspector