Ryan Dunn's "Jackass" pals have taken to Twitter to mourn the TV and movie stuntman's passing.
 
Dunn died in a car crash in Pennsylvania on Monday morning, leaving his "Jackass" castmates stunned.
 
Johnny Knoxville, who leads the posse of daredevils, writes, "Today I lost my brother Ryan Dunn. My heart goes out to his family and his beloved Angie. RIP Ryan, I love you buddy."
 
Castmate Jason 'Wee-Man' Acuna adds, "I MISS YOU BUD!! You were always a happy kick-a** dude!!"
 
And Dave England tweets, "I love you Ryan. I'm gonna miss you bad."
 
Stuntman Steve-O also took to Twitter to reflect on the terrible news, writing, "I don't know what to say, except I love Ryan Dunn and I'm really going to miss him."