Jackass star Ryan Dunn, who made viewers cringe and snicker through vulgar stunts in the multimillion-dollar TV and movie franchise, has been killed in a car crash at the age of 34.
Dunn, a daredevil whose most famous skits included diving into a sewage tank was driving his 2007 Porsche in suburban Philadelphia when it went off the road, flipped over a guardrail and crashed into the woods before bursting into flames.
A passenger was also killed, and speed may have been a factor in the crash, West Goshen Township police said.
The force of impact shattered the vehicle into several twisted and blackened pieces, leaving the Porsche 911 GT3 unrecognisable except for a door that was thrown from the crash and not incinerated. A 100ft-long tyre skid marked where the car left the roadway.
Both Dunn and his passenger were severely burned. Police said they were able to identify Dunn through his tattoos and hair.
Officers also identified his passenger as 30-year-old Zachary Hartwell.
Dunn appeared on MTV shows Jackass and Viva La Bam, as well as three Jackass big-screen adaptations.
His longtime friend and fellow Jackass daredevil Johnny Knoxville tweeted on Monday afternoon: "Today I lost my brother Ryan Dunn. My heart goes out to his family and his beloved Angie. RIP Ryan, I love you buddy."
In a statement, MTV praised Dunn's tireless humour and enthusiasm and said he would be missed.
"We are devastated by the tragic loss of Ryan Dunn - a beloved member of the MTV family for more than a decade," said Van Toffler, president of MTV Networks Music/Films Group. "The Jackass brotherhood will never be the same."