Kate Winslet decided to put an end to her seven year old marriage with Sam Mendes ‘out of boredom’, it has been alleged.

The Oscar-winning actress, 34, and the director, 44, called it quits two years after they teamed up for the film Revolutionary Road, based on a drifting couple.

“She felt bored. When Sam isn”t working, he”d just as soon stay home. Kate loves going out. … She was the one pushing for the divorce,” the New York Daily News quoted a friend of the couple as saying.

The source further claimed Winslet’s steamy scenes with co-star Leonardo DiCaprio in the film were the tipping point.

The friend said that movie “put a lot of stress on their marriage” and “Kate came to regret making the movie with Sam.”

The pal continued: “They”ve been pretty much living separate lives since the end of the summer. They realized some time ago that they were not a good fit. They were more like brother and sister.”