While none of the primary cast have been confirmed to be returning as yet - which would include Ben Whishaw as the voice of Paddington, as well as Sally Hawkins, Peter Capaldi, Hugh Bonneville, Julie Walters, and Jim Broadbent as his friends and neighbours - the one confirmed bit of news is that Paul King, the writer and director of the first two movies, won't be back for this one.
A replacement writer and/or director has not yet been confirmed, but Studiocanal did tell Variety that:" Additionally, the two Paddington movies have managed to rope in some incredibly high profile actors for the more villainous roles, including Nicole Kidman, Brendan Gleeson and Hugh Grant, who really should've been nominated for an Oscar for his performance in the second movie.