Johnny Knoxville (born Philip John Clapp on March 11, 1971 in Knoxville, Tennessee) is an American comic actor and daredevil. Knoxville has been featured in a number of films, but is best known as the co-creator and principal star of the MTV series "Jackass" and its subsequent films.

Steve-O (born Stephen Gilchrist Glover on June 13, 1974 in Wimbledon, London, UK to an American father and a Canadian mother) is a daredevil performer and television personality. He is best known as one of the performers on the TV series "Jackass".

Bam Margera (born Brandon Cole Margera on September 28, 1979, name legally changed to "Bam") is a professional skateboarder and television personality. He released a series of videos under the CKY banner and came to prominence after being drafted into MTV's "Jackass" crew. He has since appeared in MTV's "Viva La Bam" and "Bam's Unholy Union", both "Jackass" movies, and "Haggard", which he co-wrote and directed.

Chris Pontius (born Christopher Andrew Pontius on July 16, 1974 in Pasadena, California) is an American entertainer and daredevil. Pontius is a member of "Jackass" and, along with Steve-O, co-host of "Wildboyz".

Jeff Tremaine (born December 8, 1966) is an American film and television producer/director, and, along with Johnny Knoxville and Spike Jonze, one of the creators of MTV's "Jackass". He directed "Jackass: The Movie", "Jackass Number Two", and "Jackass" spinoff "Wildboyz". Tremaine is the former editor of Big Brother Magazine and a former art director of the influential BMX magazine GO as well as a former professional BMX rider.

Ryan Dunn (born June 11, 1977) in Medina, Ohio) has appeared on "Jackass", MTV's "Viva La Bam", "Homewrecker", and is a member of the CKY Crew. Ryan played the main character in Bam Margera's film "Haggard", which was based on a failed relationship Ryan had experienced. He is a close friend of Bam, as shown in "Viva La Bam". Dunn is known for wrecking cars; he once flipped a car 8 times into oncoming traffic with Bam Margera, …

Dave England, (born December 30, 1969) has appeared on the MTV series "Jackass", "Jackass: The Movie" and "Jackass: Number Two". Johnny Knoxville stated on The Daily Show with Jon Stewart that England has just one testicle as a result of a snowboarding accident. This is shown to be true in a deleted scene from Jackass Number Two in which England attaches a leech to his scrotum.

Brandon Ralph DiCamillo(born November 15, 1976 in West Chester, Pennsylvania also known as "Dico") is an American actor, stuntman and screenwriter. He was a founding member of the CKY Crew and rose to fame through appearances in the CKY video series and MTV's "Jackass", "Viva La Bam" and "Bam's Unholy Union". DiCamillo is also a comedic voice talent and vocalist with the band Gnarkill.

Preston Lacy is a performer and writer for the television show and companion movies, "Jackass". Lacy is most often featured with Jason Acuña (Wee-Man). Their most common skit involves Lacy chasing after "Wee-Man" down public streets in nothing more than their briefs and white T-shirts. Lacy has contributed many of the ideas that later became Jackass skits and stunts, and he is also starring alongside Chris Kattan in the upcoming film, Christmas in Wonderland.

Ehren McGhehey (born November 29, 1976) is an American daredevil and actor. He is best known as a star of the MTV series "Jackass" and its subsequent films.

Chris Raab, credited frequently as Raab Himself (born May 21, 1980 in Willow Grove, Pennsylvania), a member of the CKY Crew, was part of "Bam's crew" on "Viva La Bam" and appeared in MTV's "Jackass", "Jackass: The Movie" and "Haggard". After the finish of "Viva La Bam", Raab has reportedly moved on, and recently graduated from Shippensburg University.

Jason Bryant Acuña, better known as "Wee-Man," is one of the stars of "Jackass" on MTV and the host of NESN's skateboarding show "54321". Acuña has achondroplasia, a form of dwarfism and is 4'7" tall. He is also a professional skateboarder and uses a regular skateboard despite claims that due to his height he uses a smaller-sized or modified skateboard. Jason's father was born and raised in northern Spain.