Christine Baumgartner seen for first time since Kevin Costner divorce

Kevin Costner’s estranged wife, Christine Baumgartner, was seen out and about — without her wedding ring — just days after filing for divorce from the “Yellowstone” star.

The 49-year-old was photographed running errands in Los Angeles on Wednesday after blindsiding her husband of 18 years by ending their marriage.

Baumgartner was dressed casually in a denim jacket, tan sweater and white jeans.

Despite ditching the symbolic piece of jewelry, the mother of three accessorized her look with a beaded bracelet, Dior necklace and oversized pair of sunglasses.

The designer seemed to be in good spirits, flashing photographers a slight smile while meeting up with a friend for lunch.

In fact, Baumgartner — who wore her hair in a loose braid — appeared very expressive while chatting with her friend over a bite to eat.

The former model filed for divorce from Costner, 68, on Monday, citing “irreconcilable differences” as the reason for the split.

She also requested joint custody of their three kids: Cayden, 15, Hayes, 14, and Grace, 12.

The following day, Costner — who was “stunned” by his wife’s decision — responded to her filing, also requesting joint custody of their children.

“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 “Bodyguard” actor’s rep said in a statement Tuesday.

A source told Page Six that the Oscar winner was “very surprised” by Baumgartner’s “actions,” noting that he “doesn’t want the divorce, and he would take her back.”

The insider also denied infinitely rumors, saying the actor still “loves her” and “there was no issue of cheating at all.”

Costner was previously married to his college sweetheart, Cindy Silva, for 16 years. Yet after welcoming three kids together — Annie, 39, Lily, 36, and Joe, 35 — the pair split in 1994 due to his alleged serial cheating, which cost him $80 million in their divorce.

The actor also shares son Liam, 27, with ex-girlfriend Bridget Rooney.

Not only is Costner dealing with drama in his personal life, but also in his work life.

The “Dances with Wolves” star is said to be leaving “Yellowstone” following the show’s fifth season due to tension with creator Taylor Sheridan.

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“It’s the same as with any showrunner and big star — there’s respect, but there’s friction,” a well-placed production source told The Post last month, noting that ego has also played a role.

A lot of their disagreements allegedly stemmed from the hectic shooting schedule, which kept Costner away from his wife and kids.

However, fans of the Western series will be able to see Matthew McConaughey return to acting after a three-year hiatus in a spinoff of “Yellowstone.”