The presenter, 35, started out on the entertainment section of the programme a decade ago.
He was then promoted to the sofa in 2005.
'Ben's two year contract with GMTV is up at the end of April,' his spokesman tells the BBC.
'Earlier this year, his management made it clear that he would not be renewing it, but would be happy to stay on temporarily during this transitional period.
'Ben is excited about moving on after 10 incredible years and will be focusing
on a number of new projects with ITV and other channels.'
News of Ben's departure comes after it was revealed Adrian Chiles will join the show later this year.
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