Ben Whishaw
Paddington Brown (voice)
Hugh Bonneville
Henry Brown
Emily Mortimer
Mary Brown
Antonio Banderas
Hunter Cabot
Olivia Colman
The Reverend Mother
Julie Walters
Mrs. Bird
Samuel Joslin
Jonathan Brown
Madeleine Harris
Judy Brown
Jim Broadbent
Samuel Gruber
Imelda Staunton
Aunt Lucy (voice)
Carla Tous
Gina Cabot