Last updated at 16:53

Dai Greene chats to Newsround about his win

Dai Greene became the first Brit to win the 400m hurdles in more than 40 years at the World Championship Athletics this summer.

He now has the World, European and Commonwealth titles in the 400m hurdles.

And he's been showing off his latest gold medal to John.

Check out the clip at the top of the page to find what Dai had to say.