He wrote and starred in two series of the BBC One sitcom Big School, playing the role of chemistry teacher Keith Church.
In 2015, he starred as Tommy Beresford in the BBC series Partners in Crime based on the Tommy and Tuppence novels by Agatha Christie. To date he has sold more than 12.5 million copies and his books have been translated into 46 languages. He is the son of Peter Williams, a London Transport engineer, and Kathleen Williams, a lab technician, and grew up in Banstead, Surrey.
Nevertheless, the star seemed to be relaxed and his usual cheerful self during his appearance on the chat show.
There are few personalities so large that their lives cannot be fitted within the hard covers of a ready-for-Christmas memoir, complete with a publicity shot and raised gold lettering on the dust-jacket.
Alan Partridge and Michael Jackson have taken the genre close to fantasy; Jade Goody was a gift who gave for as long as she could.
alongside Cheryl, and spoke about reports that the pair had previously been an item.
"When Girls Aloud came along I met Louis Walsh and asked him if any of the girls were single and he said he would ask," David, 43, said.
One wants to like Walliams, who in interviews can come across as a pensive undergraduate whose cheekiness has given him a place among a more attractive sort of celebrity.