Patrick Dempsey
Patrick DempseyReuters

"Grey's Anatomy'" actor Patrick Dempsey's wife, Jillian Fink, filed for divorce on Friday, and from the look of things they are heading for an ugly separation.

Fink, who was married to Dempsey for 15 years, filed for divorce citing irreconcilable differences and has asked for spousal support and child support. However, she has agreed to joint custody of their children -- Talula Fyfe, 12, and twins Sullivan Patrick and Darby Galen, 7.

The couple does not have a prenup and therefore, Fink is entitled to half the $40 million the actor is worth. "It remains to be seen whether it will be amicable," a source told TMZ.

Dempsey and Fink were married in 1999. He was previously married to Rocky Parker from 1987 to 1994. The actor is believed to have met Fink in a hair salon, the same year he divorced Parker.

In the meantime, the couple released a joint statement saying: "It is with careful consideration and mutual respect that we have decided to end our marriage. Our primary concern remains the well-being of our children, and we ask with profound gratitude that you respect our family's privacy at this very sensitive time."

Dempsey, who essays the role of Derek Shepherd on "Grey's Anatomy," recently revealed that he will be taking a break from the medical drama, and this hiatus might be a good thing for the actor, as he can use the time to sort out the issues in his personal life.

In an interview with the Portland Press Herald, he said: "Acting [in Grey's Anatomy] has been a blessing for me and has allowed me to do all this. But it's transitional for me right now...I'm looking forward to the next thing, creatively. I do want to act (after 'Grey's Anatomy'), but I might take a break and go race and travel first. I haven't found a piece of material I want to do yet."