CKY (sometimes stylized cKy) is an American alternative metal band that formed in West Chester, Pennsylvania in 1998. Traditionally centered around core members Deron Miller (vocals, guitar), Chad I Ginsburg (guitar, vocals) and Jess Margera (drums), the band shares its name with a skateboarding and stunt video series produced by Bam Margera, brother of drummer Jess. CKY is closely linked with the crew of the same name, and their music is often featured on the crew's productions including the Jackass and Viva La Bam television series.