Ben Whishaw

Paddington Brown (voice)

Sally Hawkins

Mary Brown

Hugh Bonneville

Henry Brown

Hugh Grant

Phoenix Buchanan

Madeleine Harris

Judy Brown

Samuel Joslin

Jonathan Brown

Julie Walters

Mrs. Bird

Imelda Staunton

Aunt Lucy (voice)

Brendan Gleeson

Knuckles McGinty

Jim Broadbent

Samuel Gruber

Peter Capaldi

Reginald Curry

Ben Miller

Colonel Lancaster

Jessica Hynes

Miss Kitts

Michael Gambon

Uncle Pastuzo (voice)

Noah Taylor

Phibs

Tom Davis

T-Bone

Tom Conti

Judge Gerald Biggleswade

Sanjeev Bhaskar

Dr. Jafri

Joanna Lumley

Felicity Fanshaw

Kobna Holdbrook-Smith

Warden Walker

Simon Farnaby

Barry

Richard Ayoade

Forensic Investigator

Nicholas Woodeson

Insurance Company CEO

Eileen Atkins

Madame Kozlova

Shola Adewusi

First Ms. Peters

Nadine Marshall

Second Ms. Peters

Michael Mears

Clerk of Court

Louis Partridge

G-Man

Claire Keelan

Police Officer

Meera Syal

Prosecutor

Alex Jordan

Steve Visby

Nicholas Lumley

Farmer Jack

Jamie Demetriou

The Professor

Justin Edwards

Dozy Policeman

Maggie Steed

Gertrude Biggleswade

Joel Fry

Postman

Hiten Patel

Office Executive (uncredited)