Colin Firth and his wife Livia Giuggioli have separated.
Publicists for the couple confirmed the news in a statement to PA.
It said: "Colin and Livia Firth have separated. They maintain a close friendship and remain united in their love for their children.
“They kindly ask for privacy. There will be no further comment.”
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The split comes a year and a half after Italian film producer Giuggioli admitted to a relationship with a man she accused of stalking her.
A statement released at the time said: “A few years ago Colin and Livia privately made the decision to separate.
“During that time, Livia briefly became involved with former friend Mr Brancaccia.
“The Firths have since reunited.
“Subsequently, Mr Brancaccia carried out a frightening campaign of harassment over several months, much of which is documented.”
Brancaccia denied the stalking claims.
He told The Times: “We were romantically involved, she wanted to leave Colin for me.
“My ‘stalking’ consisted of two messages via WhatsApp after she ended our relationship in June 2016, and an email."
Love Actually star Firth, 59, and Giuggioli tied the knot in 1997 after they met on the set of the 1996 BBC drama Nostromo.
They have two sons, Luca and Matteo.