David Walliams reveals he's writing an autobiography

David Walliams won the Landmark award at the NTAs earlier this week

David Walliams has revealed he's writing an autobiography.

Speaking at the National Television Awards (NTAs), the actor said he was "excited" to be writing a book, which he says will be titled Camp David.

"It's weird, in writing it you remember more and more things," he said. "Also, it's good to ask other people what their memories are.

"I did keep diaries from about the age of 30, so I've got a lot of stuff there."

He added: "I think the hardest thing is recalling people's names - like a teacher who taught you 30 years ago."

When asked if he thought he was too young to be writing a book, Walliams joked: "I'm 62.

"Some really young people have written them. Kenneth Branagh wrote one when he was 26."

The actor says the book will be released later this year.

Walliams was speaking backstage at the NTAs on Wednesday, where he won the Landmark award for his charity work.

Last year, he swam the length of the Thames to raise money for Sport Relief.

'Fantastic' judging

David Walliams is a judge on the new series of Britain's Got Talent, alongside Simon Cowell, Amanda Holden and Alesha Dixon.

Earlier this week, there were reports that Cowell was worried about Walliams' jokes on the show being too risky.

But the Little Britain actor dismissed those as rumours, branding them "made-up".

He joked: "It's surprising to find out, I don't know if you know but newspapers completely make up things."

The 40-year-old says he's pleased with how his first week of filming has gone.

"I kept looking to the [Britain's Got Talent] team for guidance but they were like 'no, great, love it, fantastic'."

"We've done three days now and I haven't been sacked."