Curb Your Enthusiasm creator and star Larry David and his wife, eco-activist Laurie David, have split after 14 years of marriage, a rep for the couple confirms.

“It’s completely amicable,” says the rep. “They are both really sad but they are great friends and they are still spending a lot of time together at their LA home with their kids.”

The Davids have two children, Cazzie, 12, and Romy, 10, who last month appeared with their father in an episode of Hannah Montana on the Disney Channel.

News of the divorce was first reported by the New York Post‘s Page Six column.

Although Laurie, 49, was a producer of An Inconvenient Truth, last year’s Oscar-winning Al Gore documentary about global warming, and recently toured with Sheryl Crow to shed awareness of the state of the planet, Larry, 59 (who also helped create, write and executive produce Seinfeld), has long joked about her environmental work – among other things.

In 2005, he told PEOPLE, “I think you probably read where I said I thought I married a narcissistic, materialistic kind of princess from Long Island, and it turns out that she completely misrepresented herself.”

Of her hard work on behalf of Mother Earth, he said, “She gets up now at 5 o’clock in the morning. I will wake up and I’ll see her at the computer, which she’s already been at for two hours. I hardly ever see her except when she’s telling me she’s giving my car away or I have to appear somewhere on behalf of [the environmentally friendly hybrid car] Prius.”

All kidding aside, he added, “There is nothing selfish about her motives in any way. This is just in her blood to do something about global warming, and I’ll be damned if she’s not going to.”

In turn, Laurie had praise for his skills as a parent. “He was a performer who was a comedian. What do they know about being fathers? But he’s the best father in the whole world,” she also told PEOPLE in 2005. “I never expected that. I knew I wanted to be a good mother and thought that could cover for both of us, but it was a nice gift to find out he was a good dad.”