Kevin Costner 'didn't want' to divorce his wife Christine after 18 years of marriage

Kevin Costner reportedly did not want to file for divorce from his wife of 18 years Christine Baumgartner, sources have claimed.

The Oscar winner, 68, and Baumgartner, 49, are officially splitting after she made the shock move to file for divorce on Monday, citing "irreconcilable differences".

An insider told People the breakup was not the Yellowstone star's idea and claims Costner does not want a divorce.

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"It was not anything that he wanted or sought, and if he could change the situation, he would," the insider told the publication.

After Baumgartner's filing, reps for Costner shared a statement announcing news of the split.

"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," the statement reads.

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

Baumgartner has not issued a statement following the divorce news.

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The couple, who tied the knot in 2004, share three children: Cayden, 15, Hayes, 14, Grace, 12.

Baumgartner reportedly asked for joint custody of the kids in her filing.

The Dances with Wolves actor filed his response on Tuesday (Wednesday in Australia), where he also asked for joint custody of his three children.

Costner and Baumgartner dated on and off in the early 2000s, before eventually marrying in September 2004.

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Their relationship reportedly nearly came to an end after Baumgartner gave the actor an ultimatum about having children.

"Finally, there came a moment where, maybe this doesn't go forward," Costner told Extra in 2021. "I'm not going to lose her because I'm afraid."

Costner also has four older children from previous relationships – daughters Annie and Lily and sons Joe and Liam.

The actor was previously married to his first wife Cindy Costner from 1978 until 1994.