Chuck Norris, the martial arts grandmaster and action star whose roles in "Walker, Texas Ranger" and other television shows and movies made him an iconic tough guy — sparking internet parodies and adoration from presidents — has died at 86.

Norris died Thursday, in what his family described as a "sudden passing."

"While we would like to keep the circumstances private, please know that he was surrounded by his family and was at peace," the family said in a statement posted to social media.

Before he would become a star in movies and on TV, Norris was wildly successful in competitive martial arts. He was a six-time undefeated World Professional Middleweight Karate champion. He also founded his own Korean-based American hard style of karate, known sometimes as Chun Kuk Do, and the United Fighting Arts Federation, which has awarded more than 3,300 Chuck Norris System black belts worldwide. Black Belt magazine ultimately credited Norris in its hall of fame with holding a 10th degree black belt, the highest possible honor.

Born Carlos Ray Norris in Ryan, Oklahoma, on March 10, 1940, he grew up poor. At age 12, he moved with his family to Torrance, California, and joined the U.S. Air Force after high school, in 1958. It was during a deployment to Korea that he started training in martial arts, including judo and Tang Soo Do.