Professional wrestling legend Bret Hart revealed Monday that he's battling prostate cancer.

"I've had a great lifelong dance and I'm a survivor of many hard battles. I now face my toughest battle," Hart wrote in an Instagram post.

"In the next few days, I will undergo surgery with the hope of defeating this nemesis once and for all."

Hart, 58, is considered one of the greatest pro wrestlers of all-time. He began his career in Calgary in the '70s as part of a family dynasty. His dad, WWE Hall of Famer Stu Hart, owned and ran Stampede Wrestling, and also trained Bret and his brothers.