Kevin Costner's Wife Christine Files For Divorce After 18 Years of Marriage

The 'Yellowstone' actor and his estranged wife wed in 2004 and share three children.

Calling it quits. Kevin Costner's wife, Christine Costner, has filed for divorce. Christine filed the documents to terminate her marriage with the Yellowstone actor on Monday, after more than 18 years of marriage.

A rep for Kevin confirmed the news of their split in a statement to ET Tuesday afternoon, stating, "It is with great sadness that circumstances beyond his control have transpired which have resulted in Mr. Costner having to participate in a dissolution of marriage action."

"We ask that his, Christine’s and their children’s privacy be respected as they navigate this difficult time," the statement concluded.

In Christine's filing, which were obtained by ET, she cites irreconcilable differences as the grounds for divorce. She lists the date of separation April 11.

In Kevin's response, which was obtained by ET, he does not list a date of separation and notes that he and his estranged wife, who are both seeking joint custody of their children, have a prenuptial agreement. Christine is not seeking spousal support, according to the docs.

TMZ was first to report news of the split.

The pair tied the knot in September 2004 at his Aspen, Colorado ranch. They share three children -- Cayden, 15, Hayes, 14 and Grace, 12.

Kevin has been married once before and is the father of four other children as well, including Annie, 39, Lily, 36, and Joe, 35 -- whom he shares with his first wife, Cindy. He also has a 27-year-old son, Liam, from his relationship with actress Bridget Rooney.