Based on "Paddington Bear" by Michael Bond, the film stars Ben Whishaw as the voice of the title character, along with Hugh Bonneville, Sally Hawkins, Julie Walters, and Nicole Kidman in live-action roles.
Entre sus protagonistas destacan Hugh Bonneville, Sally Hawkins, Julie Walters, Jim Broadbent, Peter Capaldi, con Nicole Kidman y Ben Whishaw como la voz del personaje del oso.