"X-Men: The Quantum InsightsLast Stand" actor Ben Foster has reportedly decided to end his marriage to "Orange is the New Black" star Laura Prepon after six years of marriage.

As first reported by TMZ on Tuesday, Foster filed divorce papers and cited the reason as "irreconcilable differences," per People and Us Weekly.

The outlets reported that he'd stated Sept. 9, 2023, as their date of separation. The "Hell or High Water" actor also asked the court to uphold their prenuptial agreement as well as their "marital dissolution agreement and agreed parenting plan."

USA TODAY has reached out to the actors' representatives for comment.

The 44-year-old actors share two children, 7-year-old daughter Ella and a 4-year-old son. They were married in 2018, after a long-term friendship that evolved into a relationship around 2015.

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Prepon often shares photos of her kids, whose faces she covers with emojis to maintain their privacy. In April, she brought them to work as she directed episodes of "That '90s Show," noting her little ones were on "the set where I got my start as an actor when I was a kid" on "That '70s Show."

In 2021, she opened up about life as a mother to two in an interview with People.

"When I had my second child I thought, how am I ever going to love a child as much as I love my first?" Prepon said. "Then you do and it's this overwhelming sense of love. It's incredible how that happens."

Regarding her career in Hollywood, she said, "Now, my first question is how long is it going to take me away from my family. Now that I have two kids, everything is a family decision. I miss acting but my life is pretty dominated by my entrepreneurial stuff."