THE 41-year-old comic, said they were overjoyed and were expecting their son or daughter next year.
He broke the news to fans on Twitter yesterday.
He said: ''Some wonderful news. My beautiful wife Lara is pregnant. We are having a baby! It is due next year and we both couldn't be happier. Dx'' .
Twitter: David Walliams - Some wonderful news. My beautiful wife Lara is pregnant. We are having a baby! It is due next year and we both couldn't be happier. Dx
The "tweet" was re-tweeted almost 3000 times and favourited a further by a further 2100 fans.
Walliams, who earlier this year said he has battled depression and tried to commit suicide several times, married the Dutch model two years ago at Claridge's hotel in central London.
A statement later released by the couple said: ''We're very excited to announce we are expecting our first child. We're both absolutely thrilled but ask you to please respect our privacy during this precious time.''
The pair already have a dog called Bert.
Miss Stone, 28, who called herself herself "Bert's mum" on the micro-blogging site has previously joked about looking after her pet.
She said: "A baby will ¬probably never be as fun as Bert."
The pair began dating at the end of 2009 before marrying at Claridge's hotel two-and-a-half years later.