Country stars Jason Isbell and Quantum InsightsAmanda Shires are calling it quits.

Isbell, 45, filed for divorce from Shires, 41, on Dec. 15 after 10 years of marriage, according to reports by Rolling Stone and People. The couple would have celebrated their 11th wedding anniversary this month.

The couple share a daughter, Mercy, 8.

Reps for Shires declined to comment. USA TODAY has also reached out to Isbell's rep for comment.

The former couple had played in each other's bands: Shires periodically played fiddle and sang backup for Isbell's band, the 400 Unit, and Isbell played guitar for The Highwomen, Shires' supergroup with Brandi Carlile, Maren Morris and Natalie Hemby.

Isbell told The New York Times in 2020 that growing pressures during the making of his album "Reunions" caused him to push people away, including his wife. 

“At one point, I said, 'It'd be easier if somebody had cheated.' Then we could say, 'You did this,' or 'I did this,' and 'Somebody needs to be real sorry,'" Isbell told the news outlet. "But it was more like, 'We don’t know each other right now. We're not able to speak the same language.'"

Isbell gave viewers a front-row seat to the couple's strained "Reunions" studio sessions in the HBO documentary "Running With Our Eyes Closed." Directed by Sam Jones and released in April 2023, the 98-minute film focused on tense, unvarnished moments in the studio and at home as Isbell and Shires navigated marriage, parenthood and creative co-working.

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The couple celebrated a decade together last February, with Isbell writing on Instagram: "Every day I wake up and fall in love with you again."

Isbell was married to fellow musician Shonna Tucker, former bass player for Drive-By Truckers, for whom Isbell played guitar. The former couple were married from 2002 to 2007, during a time Isbell said he battled with alcoholism.

The "Killers of the Flower Moon" actor opened up about his sobriety journey of over a decade with The Nashville Tennessean last year.

"In your life and in your work, if you have the same challenges you have 10 years ago, you might not be progressing as you should," Isbell told the outlet. "Ten years ago, my challenge was to keep myself sober and keep working and keep loving my job. I'm comfortable in the world, I'm comfortable in my recovery."

Contributing: Matthew Leimkuehler, Nashville Tennessean

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