Michael Buckner/Getty Images
Television personality Ryan Dunn attends the Blu-ray and DVD release of Paramount Home Entertainment's 'Jackass 3' at the Paramount Studios on March 7, 2011 in Los Angeles, California.
He was on the MTV show and in the three Jackass movies. Police tell news outlets in Pennsylvania that Dunn and a passenger died when the actor's Porsche went over a guardrail.
Jackass actor Ryan Dunn "was killed early Monday morning when his Porsche flew over a guardrail in West Goshen, Pa., slammed into a tree and burst into flames, according to local police," NBC Philadelphia reports. "Dunn's passenger — who hasn't been identified — was also killed."
As The Associated Press writes, "Dunn appeared on the MTV show that ran from 2000 to 2002 and its three big-screen adaptations. Most recently, he hosted Proving Ground on the G4 cable network."
He also appeared on NBC-TV's Minute To Win It.
If you're not familiar with the Jackass TV show and movies, as IMDB says the premise is this:
"Johnny Knoxville and his band of maniacs perform a variety of stunts and gross-out gags."