James Corden

Narrator

Dustin Hoffman

Mr. Hoppy

Judi Dench

Mrs. Silver

Salo Gardner

Mr Mavrokoukoudopolous

Lara Rossi

Puppy Boy Mother

Jimmy Akingbola

Keen Petshop Keeper

Katie Lyons

Philip's Mother

Pixie Davies

Roberta

Richard Cordery

Mr. Pringle

Pik-Sen Lim

Mrs. Wu

Polly Kemp

Woman Passenger

Alexander Bracq

Rollerblading Couple

Joseph West

Phillip

Anna Cannings

Mrs. Court

Lisa Hammond

Mrs Desmond

Emily Ralph

Little Girl

Geoffrey McGivern

Shop Keeper

Leo Umeh

Puppy Boy

Ronnie Hughes

Trumpeter

Jack Honeyborne

Pianist

Aaran Mitra

Boy in Pet Shop (uncredited)