The Beastie Boys are an American hip hop band from Manhattan/Brooklyn, New York City. For the majority of its career, the group has consisted of MCs Michael Diamond, known as Mike D (vocals, drums), Adam Horovitz, known as Ad-Rock (vocals, guitar), and Adam Yauch, known as MCA (vocals, bass, double bass), with contributing musician Mix Master Mike (turntablist).
Formed as a hardcore punk band in 1981 by Yauch and Diamond, with drummer Kate Schellenbach and guitarist John Berry, the band appeared on the compilation cassette New York Thrash, before recording their first EP Polly Wog Stew, in 1982. After achieving moderate local success with the 1983 experimental hip hop 12" Cooky Puss, the group transitioned to hip hop in 1984 and released a string of successful 12" singles.