Kevin Costner’s ex Christine Baumgartner calls $129K monthly child support ‘insufficient’: report

This divorce may cost Kevin more than he thinks.

Kevin Costner’s estranged wife, Christine Baumgartner, reportedly wants the “Yellowstone” star to dig deeper in his wallet when it comes to monthly child support — apparently arguing that $129,000 a month isn’t enough to maintain their kids’ lush lifestyle.

In legal documents obtained Friday by TMZ, Baumgartner, 49, is allegedly asking the court to make Costner, 68, pay her around $175,057 per month so their three kids can experience the same lifestyle with each parent.

Baumgartner reportedly claims in the documents that the kids live in a beach compound with their dad worth between $65 million and $95 million, and take private planes while on fancy vacations with him.

The handbag designer claims the “Let Him Go” actor should pay more in child support “so that the children can go on comparable vacations when they are with her. This is true even if the child support payments also improve Christine’s lifestyle.”

Baumgartner added that this is simply the standard required by the California family code and that the mere $175,000 “will not be sufficient to replicate Kevin’s lifestyle, but it will be sufficient to allow her to provide a lifestyle for the children which is relatively comparable.”

The Post has contacted reps for Costner and Baumgartner for comment.

This comes after Baumgartner reportedly accused Costner of “withholding” evidence of his finances in a California Superior Court filing on Monday and obtained by People.

Her attorney allegedly claims he has been “stonewalling” by not divulging information ahead of their scheduled child support hearing next week.

Baumgartner claims the “Bodyguard” actor disclosed that he had $102,716,000 in assets in 2004 when they signed their prenup.

But now, she claims the actor’s net worth quadrupled to $400 million — with about $24 million in cash. Thus, Baumgartner’s legal team has asked the court to have Costner show documents related to his business ventures.

Baumgartner filed for divorce from Costner in May after 18 years of marriage. They share sons Cayden, 16, Hayes, 14, and daughter Grace, 13.