Denise Van Outen and Lee Mead reportedly split months ago.
The 39-year-old actress and the 32-year-old musical theatre actor - who have three-year-old daughter Betsy together - are said to have been living apart for the last few months of their relationship, but are keen to remain friends.
A source close to the couple told the Daily Mirror newspaper: "They have been living separate lives for months. It is sad, but sometimes things don't work out. They'll remain friends."
Denise's agent released a statement confirming the pair have called time on their four-year marriage, and while they both feel "sad" about the situation, they are determined to make sure their daughter is their main priority.
It said: "Following continued speculation, Denise Van Outen and Lee Mead are sad to confirm they have decided to separate.
"The couple remain the best of friends, with their daughter Betsy as their number one priority."
The pair's split comes after months of speculation suggesting they had broken up as they have barely been seen together, with Lee even missing Denise's appearance in the 'Strictly Come Dancing' final last year.
Denise and Lee began dating in November 2007 just five months after he won talent show 'Any Dream Will Do', on which the blonde beauty was a judge.
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