The friendly spectacled bear from "darkest Peru" has been a key fixture in the book cases (and TV screens, too) of many children.
So it was only right that when he reached the landmark birthday they had a party – and there might even have been the off marmalade sandwich or two!
Can you spot yourself or someone you know in our gallery of photos?
1. Paddington's birthday at Newry Library
Celebrating Paddington Bear's 50th birthday at an event at Newry Library. Photo: Newry Reporter
2. Paddington's birthday at Newry Library
Celebrating Paddington Bear's 50th birthday at an event at Newry Library. Photo: Newry Reporter