Kelly Clarkson’s ex-husband, Brandon Blackstock, has reportedly died after battling cancer. He was 48.

“It is with great sadness that we share the news that Brandon Blackstock has passed away,” a family rep told People Thursday.

“Brandon bravely battled cancer for more than three years. He passed away peacefully and was surrounded by family. We thank you for your thoughts and prayers and ask everyone to respect the family’s privacy during this very difficult time.”

The heartbreaking news comes less than 24 hours after Clarkson announced via social media that she was abruptly canceling her Las Vegas residency, as her ex had been “ill.”

“While I normally keep my personal life private, this past year, my children’s father has been ill and at this moment, I need to be fully present for them,” she wrote via Instagram Wednesday.

“I am sincerely sorry to everyone who bought tickets to the shows and I so appreciate your grace, kindness and understanding.”

Clarkson, 43, and Blackstone — who settled their divorce in 2022 after years of contentious court battles — shared two children: River, 10, and Remington, 8.

In the divorce, the “American Idol” alum was granted primary custody of their kids, but ordered to pay the music manager, who was Reba McEntire’s ex-stepson, $115,000 a month in spousal support until January 2024.

Despite their differences, Page Six exclusively learned Thursday that Clarkson helped care for Blackstock amid his health struggles.

We were told the mom of two when suddenly took time off from NBC’s “The Kelly Clarkson Show” in February and March of this year in order to look after her ex-husband.

This story is developing ….