A statement said: '"We confirm that Paul Hollywood has separated from his wife. Their priority is protecting their son. He will be making no further comment on this private matter."
According to the Daily Mail, the 47-year-old's marriage was over "just weeks" after he filmed the American version of GBBO with young female chef, Marcela Valladolid.
Sources say he has already moved out of his family home and is now living alone in Kent.
An insider told The Sun that Paul and Marcela became great friends during filming last month.
They added: "Marcela loved his Scouse charm and he thought she was gorgeous and talented - the perfect package.
"During filming they got very close and count each other as close friends."
The pair have even shared some banter over Twitter, tweeting pictures of themselves together on set in the US.
Last month mother-of-one Marcela tweeted a picture of a lavish breakfast she had made, adding: "I am officially the best mom/aunt/party-planner on the planet."
While Paul tweeted back: "I'll be the judge of that !!!"
Paul and his wife, Alexandra, have an 11-year-old son and have been together for 15 years, with her previously labelling his sexy status as "hilarious".
He told the Daily Mirror: "My wife finds it all hilarious. We love going out as a family with our son Josh, who is [at the time] 10 ... I do think ‘Oh God’ when people tell me I’m a sex symbol.
"It’s very nice but I’m actually quite introverted!”