Kate Winslet's marriage to Sam Mendes began to unravel after they worked together on critically-acclaimed movie REVOLUTIONARY ROAD, according to a U.K. report.
The British actress and her director partner announced their split on Monday (15Mar10) following nearly seven years as husband and wife.
In a statement, a representative for the couple said, "They are saddened to announce they separated earlier this year. The split is entirely amicable and is by mutual agreement. Both parties are fully committed to the future joint parenting of their children."
The couple's problems reportedly began to surface during the filming of 2008's Revolutionary Road, which saw Mendes direct Winslet and her former Titanic co-star Leonardo DiCaprio, according to Britain's The Sun newspaper.
A source tells the publication, "Sam and Kate had been arguing a lot after Revolutionary Road, their last movie together. They were spending a lot less time together.
"Their closest friends were aware that they had been on the rocks for over a year. The relationship was intense and arguments often kicked off.
"They have been living separately for a while. There had been some huge rows behind closed doors before they decided to formally separate."
Winslet and Mendes married in 2003, and have a son, Joe, who was born the same year (03). The Brit actress also has a daughter, Mia, from her first marriage to Jim Threapleton.