Ryan Matthew Dunn was an American reality television personality, actor and stunt man. He was a member of the Jackass and Viva La Bam crew.
Dunn came to prominence as a member of the CKY Crew along with long-time friend Bam Margera for their extreme stunts and pranks recorded on camera which led to the rise of MTV's Jackass and its three later feature films, which have all been commercial successes. Aside from Jackass, Dunn also hosted Homewrecker and Proving Ground and appeared in feature films such as Street Dreams and Blonde Ambition, as well as in Margera's films Haggard: The Movie and Minghags: The Movie.
Dunn died in an alcohol-related automobile accident in West Goshen Township, Chester County, Pennsylvania, on the morning of June 20, 2011, alongside his friend Zachary Hartwell, a production assistant on Jackass Number Two.