David Walliams wrote his first children's book in 2008 after signing a deal with HarperCollins and since then he has become a hugely successful author.
Since starting his career as a writer, the Britain's Got Talent judge has sold £100 million worth of books.
David, 48, has written 13 children’s story books, four collections of short stories and seven picture books.
What's more some of his books – Gangsta Granny and Mr Stink – have been made into films for the BBC.
One of his biggest successes was his second book Mr Stink, which won the People’s Book Prize in 2009.
Incredibly David's first five books sold 2.2 million copies in the UK.
And there doesn't look like there is any stopping David, as his books have made £17 million in the last year alone, according to The Bookseller magazine.
It is thought David Walliams has taken home £10 million of the £100 million his books have netted.
Speaking of his latest novel, The Beast Of Buckingham Palace, which is released this week, David said he doesn’t just read his own books to his six-year-old son.
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David, who shares his son Alfred with ex-wife Lara Stone, told The Sun: "I love being a dad. It is the best thing of all and totally life-changing.
"You feel there is finally some meaning to your life. Everything you do after they come along is for them or relates to them."
David explained he likes to vary what his son reads.
He said: "I don’t push my books on to him. I don’t want him to grow up and feel like, 'We never read any books other than my dad’s'".
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The comic reportedly earned close to £15million from his first five books alone.
David has a net worth which is believed to be around £17 million.
In 2015 during his divorce battle with his ex-wife Lara Stone it was revealed the pair had a wealth of more than £19million.
As well as his income from books, David has earned his money from appearances on a variety of TV programmes.
He rose to fame on comedy sketch show Little Britain in 2009 which he starred with alongside Matt Lucas.
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David also starred on the BBC'S airline comedy Come Fly With Me with Lucas and as science teacher Mr Church in Big School.
He has also hosted the first week of ITV’s Nightly Show as well as the Royal Variety Performance.
David has been a judge on Britain’s Got Talent since 2012, alongside Simon Cowell, Amanda Holden, and Alesha Dixon.
On Who Do You Think You are David learns of his great-grandfather’s traumatic experiences during the First World War.
He also finds out about his grandmother on his mother’s side and her grandfather, a blind showman who owned a funfair.
The funnyman tells how he doesn’t have many people he can ask about his past after the death of his grandparents and dad.
Who Do You Think You Are? airs at 9pm tonight.
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