Buckingham Palace has appeared in the Paddington books, movies and other properties.
Paddington (2014)[]
In Paddington (2014), Paddington Brown shelters from the rain in a guard alcove next to the gates of Buckingham Palace after he has run away from the Browns. The guard on shift helps Paddington by offering him food and drink, hidden under the guard's bearskin (hat). Paddington is ousted from the alcove by the guard taking over the kind guard's shift.
The Queen's Platinum Jubilee 2022 Sketch[]

The Queen's Platinum Jubilee in 2022 was preceded by a short skit featuring Elizabeth II and Paddington having tea. This skit ran for two-and-a-half minutes and was kept secret by Buckingham Palace, BBC Studios and Heyday Films/Studiocanal until its release before the concert.
The sketch was kept so completely secret that even Her Majesty’s children and grandchildren were said to have been taken by surprise.[1]