James Corden thought school was "pointless"

He said: "[School] was just pointless to me -- I don't need to know how glaciers separate."

The 'Late Late Show' host - who has children Max, five, and Carey, 22 months, with wife Julia - was also a target of bullies because of his size, but was able to deflect their comments with his confidence and humour.

He told Rolling Stone magazine: "If you're big at school, you've really got two choices.

"You're going to be a target. If you go to school and you're me, you go, Right, I'm just going to make myself a bigger target. My confidence, it will terrify them.' That's how I felt in school.

"Inside, you're terrified. But if you're a bit funny, if you're quicker than them, they won't circle back on you again."

And James admitted he finds it frustrating that "heavy" people's relationships are always depicted as "kooky" or different in movies.

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."

Meanwhile, James' talk show is best known for its 'Carpool Karaoke' segment, where the host joins a well-known act in a vehicle to sing their biggest hits.

And he is able to reassure star guests such as Mariah Carey, Sir Elton John and Justin Bieber by reminding them they are in a "safe place".

He said: "You're getting in a car. The doors close. It's the two of you. You're going to put the music on. We're going to sing our hearts out.

"What I say to everybody is, this is a safe place. The more you go for it in the songs, like you're playing Madison Square Garden, the better it is.

"I have to meet them halfway with that. If I am at all timid in those moments, then they're going to be like, 'Wait. Hang on. What am I doing?'?"