Matt Smith has a scar on his chin from falling at James Corden's wedding

Interviewing Matt on The Late Late Show with James Corden, the host said: "You were the star of our wedding in many ways. Do you remember anything about that day?"

To which Matt replied: "I've got a scar on my chin where I fell up the stairs. I fell in a fireplace - twice! It wasn't alight, thank God; I am a fire hazard. I danced with Kylie Minogue, which was glorious. And then your dad put me in a car. At the end, he was like, 'Matt ... Come on, son. It's time. It's time.' He put me in the car; it was a silver Mercedes. I got in, and I closed the door, and I got around the side and ran back inside! But what a wedding."

Meanwhile, James previously admitted Julia wasn't aware of who he was when they first fell in love.

Speaking in 2016, he said: "I could never understand when I watch romantic comedies the notion that for some reason unattractive or heavy people don't fall in love. If they do, it's in some odd, kooky, roundabout way - and it's not. It's exactly the same. I met my wife; she barely owned a television and worked for Save the Children. We sat down one night and we fell in love and that was it."