News broke this morning that 'Jackass' star Ryan Dunn, 34, died in a car accident in Goshen, Penn. Dunn had tweeted a picture of him and two friends drinking just hours before the high-speed crash occurred at approximately 3AM EST on June 20. The car caught fire, killing Dunn and his passenger.

For years now, Dunn has made 'Jackass' viewers laugh with his wild antics. Many pop stars were saddened and shocked by Dunn’s death, with several taking to Twitter to post their reactions. Here’s what they had to say:

Rob Thomas (@ThisIsRobThomas): so sad to hear about ryan dunn. r.i.p. he had a lot of fun while he was alive.

Joel Madden (@JoelMadden): R.I.P Ryan Dunn. Very sad news.

The Ready Set (@thereadyset): #RIPryandunn. Such a bummer. Cky and jackass stuff is always classic.

Casey Abrams (@CAbramsAI10): RIP Ryan Dunn. I felt we coulda been bearded buddies. Enjoyed growing up with you on my tv.

Tyler the Creator (@f---tyler): Damn. Rest In Da Peace Ryan.

Asher Roth (@asherroth): West Chester lost a good one today. Love to Ryan Dunn's fam & friends.

In addition to these musicians, Dunn's 'Jackass' friends also took to Twitter to express grief over the passing of their close friend. It is has truly been a day of mourning, and our hearts go out to them and Dunn's loved ones. Here is what the guys from 'Jackass' had to say:

Steve-O (@SteveO): I don't know what to say, except I love Ryan Dunn and I'm really going to miss him.

Rick Kosick (@rickkosick): I’ve been thinking about all the good times I’ve had with Ryan and it’s hard to hold back the tears. I already miss him. RIP Ryan Dunn.

Johnny Knoxville (@realjknoxville): Today I lost my brother Ryan Dunn. My heart goes out to his family and his beloved Angie. RIP Ryan , I love you buddy.

According to the Jackassworld Twitter account, Bam Margera’s radio show, Radio Bam, will be airing a special memorial episode tonight, June 20, in honor of Ryan Dunn. The show airs on Sirius 41 or XM 41 at 7PM EST.