Kevin Costner's wife files for divorce after 18 years of marriage

Kevin Costner's wife files for divorce after 18 years of marriage< /p> UPDATE DAY

Kevin Costner would be “devastated” since his wife of the last 18 filed for divorce.

 The 'Yellowstone' star and his wife, Christine Baumgartner, confirmed their separation last Tuesday.

“It is with great sadness that circumstances beyond his control have occurred which have compelled Mr. Costner to participate in a marriage dissolution action,” a spokesperson for the actor said in a statement released by PEOPLE magazine. &nbsp ;

We therefore understand that it was therefore not the actor's desire to separate from the mother of his three children, Cayden, 15, and Hayes, 14, and Grace, 12 years.

The handbag designer reportedly cited “irreconcilable differences” as the reason for separation. Kevin Costner has meanwhile explained that a prenuptial agreement was in place, presumably protecting part of his fortune amassed before their marriage.

In 2004, the two were married at the actor's ranch in Colorado in front of his family and friends, including Tim Allen and the actor's 'They Dance With Wolves' co-star Mary McDonnell.

According to divorce papers obtained by TMZ – which was the first outlet to report the news of the split – the former lovers have filed for joint custody of their three children.

Kevin Costner is also the father of four adult children: Joe, Liam, Annie and Lily from his past relationships. Before Christine, Kevin Costner was married to Cindy Silva from 1978 to 1994.