CKY (sometimes stylized cKy) is an alternative metal band that formed in West Chester, Pennsylvania, USA in 1998. Traditionally centred on 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.