Paddington is back with his usual slapstick as a less-than-successful window washer in the first teaser trailer for the sequel.

The well-intentioned bear faces the task of getting a heavy bucket of water up a ladder, but winds up with the bucket on his head. “You’re aware that a bear is on your roof?” a constable inquires of a local resident.

“Paddington 2” stars Hugh Grant, Hugh Bonneville, Sally Hawkins, Julie Walters, Jim Broadbent, Peter Capaldi, Madeleine Harris, and Brendan Gleeson. Ben Whishaw and Imelda Staunton, who provide the voices of Paddington and Aunt Lucy, also reprise their roles.

The original “Paddington” opened in late 2014 and grossed nearly $270 million worldwide, including $76.2 million in the U.S. and $59.5 million in the U.K. The much-loved talking bear, who comes from Peru and loves marmalade, is based on a series of children’s books by Michael Bond that launched in 1958.

The sequel follows the bear,...