Hollywood mourns the loss of martial arts expert, fight choreographer, and stuntman Richard Norton. He worked with many action movie stars. He was particularly close to Chuck Norris, with whom he shared a deep friendship.

Richard Norton, a veteran stunt performer and martial artist whose credits include 'The Suicide Squad' and 'The Octagon,' has died. James Gunn says 'the film world will be a less vibrant place without him.

Chuck Norris says he's "heartbroken" following the death of legendary martial artist and actor Richard Norton -- just one of many tributes.