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Kevin Costner is officially back on the market.

The "Yellowstone" actor finalized his divorce with ex-wife Christine Baumgartner in a Santa Barbara court nine months after she petitioned to end their 18-year marriage, according to documents obtained by Fox News Digital.

"The Court finds that the Parties’ agree that the MSA (Marital Settlement Agreement) is fair and reasonable," documents stated. "The court approves the MSA in its entirety."

Baumgartner initially filed for divorce in May 2023, and the estranged couple had reached a settlement agreement in September, sources told Fox News Digital at the time. In California, a six-month period is required after filing before a divorce can be finalized.

KEVIN COSTNER, CHRISTINE BAUMGARTNER AGREE TO SKIP PARENTING CLASSES, 1 STEP CLOSER TO FINALIZING DIVORCE

Kevin Costner, Christine Baumgartner

Kevin Costner and Christine Baumgartner finalized their divorce Tuesday in a Santa Barbara court. (Getty Images)

Judge Thomas Anderle signed off on the divorce judgment two days after Valentine's Day. A notice of entry of judgment was filed Feb. 20.

Their split began on a bitter tone, with the purse designer taking Costner to court over child support and the validity of their prenuptial agreement.

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Baumgartner initially requested $248,000 in monthly child support for their three children, and Anderle set a temporary monthly sum of $129,755 in July, only to later rule that Costner would actually be responsible for $63,209 in monthly child support payments.

Kevin Costner wears black suit at wedding to Christine Baumgartner

Kevin Costner and his ex, Christine, married in Aspen in 2004. The former couple has three children together. (WireImage House)

Before the child custody battle, Costner had offered to pay $75,000 a month.

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In the final judgment, Christine was awarded $12,642 monthly child support for Cayden, 17, an additional $18,962 for Hayes, 16, and $31,605 for Grace, 13, to be paid on the first of each month.

The former couple agreed to joint legal and physical custody, with a holiday schedule set forth in the MSA, according to the documents.

Costner is also solely responsible for the children’s health care, private school tuition, extracurricular activities and the couple’s oldest son’s car expenses.

Kevin Costner wears white suit to Oscars after party with Christine Baumgartner

Christine Baumgartner filed for divorce from Kevin Costner in May after 18 years of marriage. (Getty Images)

Before the former couple signed a settlement agreement, Costner exclusively told Fox News Digital that there are no winners in their divorce battle.

"You know, when you have a life that long with somebody, there is no winner … and it's this big, crazy thing called life and how it unravels so quickly," he said. "One minute you feel like you're on top of the world, and then you realize how … vulnerable you are."

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As for his co-parenting plan with Baumgartner moving forward, Costner was certain the two would figure it out.

"She's an incredible mom," the TV star said. "We will figure it out, and we'll share. We've just got to kind of convalesce right now."