"Yellowstone" actor Barry Corbin recently got candid about his battle with oral cancer. 

Corbin, who is also a real-life cowboy, opened up about his terrifying diagnosis.

"There was a spot in the inside of my cheek that didn't go away," he told People. "It came back that it was cancer."

"I already knew what it was," he continued. "I hadn't discussed it with anybody, but I knew."

FOX NATION SIGNS DEAL WITH ACTOR KEVIN COSTNER FOR ‘YELLOWSTONE: ONE-FIFTY’ SERIES

Corbin stars as Four Sixes Ranch cowboy Ross on the show. Showrunner Taylor Sheridan also recently enlisted Corbin for his latest series, "Tulsa King," starring Sylvester Stallone.

"Yellowstone" cast

The cast of "Yellowstone," fronted by Kevin Costner, will be back for a two-hour premiere on Nov. 13 for season 5. (Frazer Harrison/Getty Images for Paramount Network)

"I didn't realize how much it would knock me out. I was sleeping 12 to 14 hours a day," Corbin admitted. "It was a little difficult, but we got it done."

The 82-year-old actor also revealed that due to his diagnosis, he could have lost his famous voice that his fans know and love him for.

Barry Corbin actor

"Yellowstone" actor Barry Corbin opened up about his battle with oral cancer. (Getty Images)

"They told me there was a possibility my vocal cords would be impacted and that would cause a big disruption in my business," Corbin said of his distinctive voice.

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Upon surgery, Corbin quickly returned to set and continues to recover.

Barry Corbin

Barry Corbin attends the premiere of "The Homesman" during AFI Fest at the Dolby Theater on Nov. 11, 2014, in Hollywood, California. (Jeffrey Mayer/WireImage/Getty Images)

The hugely popular series focuses on the Dutton family, led by Kevin Costner’s character John, who controls the largest contiguous cattle ranch in the United States. The ranch is in constant conflict with its surrounding borders as shifting alliances, unsolved murders and more unfold in the show.

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