Katherine Williams-Dunning – the daughter of country music legend Hank Williams Jr. – was killed on Saturday night in a single-vehicle crash in Tennessee. She was just 27 years old.

According to WKRN, Williams-Dunning was driving her 2007 Chevy Tahoe and towing a boat on Highway 79 near Paris, Tennessee, at around 7:45 p.m. when the vehicle crossed the median. The vehicle and boat rolled over into the northbound lanes and then came to a stop on the shoulder.

Williams-Dunning’s husband, 29-year-old Tyler Dunning, was a passenger in the vehicle. He was airlifted to Vanderbilt University Medical Center to receive treatment, but his condition has not yet been released.

“This is an active investigation and more details will be made available later,” said Tennessee Highway Patrol spokesman Lt. Brad Wilbanks.

Katherine’s brother, singer Sam Williams, asked his social media followers for prayers following the accident. Katherine and Tyler are the parents of two small children – Beau Weston, 5, and Audrey Jane, 2.

“My sister and brother in law have been In a terrible accident. Please pray for them so hard! Katie Williams and Tyler Dunning,” he wrote on Facebook. “NEED EVERYONE WHO SEES THIS TO PRAY FOR KATIE WILLIAMS RIGHT NOW AND TYLER DUNNING !!!!!!!!! PLEASE!!!!!!”

Katherine’s sister, singer Holly Williams, posted a tribute to her sister on Sunday morning and also asked for prayers for the family. She also revealed that Tyler Dunning is “awake and responding,” but they don’t know the full extent of his injuries yet.

“I have no words. On Friday morning I talked the family into taking this picture and had no idea it would be our last together with my precious little sister Katie,” wrote Holly in the caption of a family photo. “We all went to my great aunt’s funeral on Thursday whom we all loved dearly, and now are faced with another one.”

Katherine Williams and Tyler Dunning tied the knot on October 15, 2015. She ran her own clothing company called Weston Jane that was built on the idea of “moms supporting moms.”

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Katherine Williams-Dunning was one of country singer-songwriter Hank Williams Jr.’s five children. He is best known for his song All My Rowdy Friends Are Coming Over Tonight, which was re-written and turned into a theme for Monday Night Football.