Liam, who is currently in New Zealand with his other half, has been sharing loved-up snaps on Instagram with his long-term girlfriend - and his fans have gone wild for the pair.
According to The Sun, Lara took Alfred and the couple's dog Bert with her when she left their North London home.
A source close to the comedian said: "David has been putting on a brave face.
But people close to him are very worried because they know he's devastated."Meanwhile, the Mail Online reported that the split could be down to Lara's raunchy fashion shoots.
The Dutch-beauty currently stars alongside Justin Bieber in the Calvin Klein Jeans campaign in which the pair are pictured in a number of sexy poses including one where Lara has her hand down the 21-year-old's trousers.
A source told the site: "She has been really sexing it up lately, while she and David have not been spending any time together. People are speculating that David is really, really jealous and insecure about her.’Despite his heartbreak, it's business for usual for David, who is celebrating World Book Day with a helicopter tour of schools.