William Kreutzmann Jr. (/ˈkrɔɪtsmɑːn/ KROYTS-mahn; born May 7, 1946) is an American drummer and founding member of the rock band Grateful Dead. He played with the band for its entire thirty-year career, usually alongside fellow drummer Mickey Hart, and has continued to perform with former members of the Grateful Dead in various lineups, and with his own bands BK3, 7 Walkers and Billy & the Kids. At the end of 1964 Kreutzmann co-founded the band the Warlocks, along with Dana Morgan, Jr. (who was soon replaced by Phil Lesh), Jerry Garcia, Bob Weir, and Ron “Pigpen” McKernan. Their first gig was May 5, 1965, two days before Kreutzmann’s nineteenth birthday. During the band’s early days, Kreutzmann sometimes used a fake draft card with the name “Bill Sommers” to be admitted to bars where the band was playing, since he was underage. In November 1965, the Warlocks became the Grateful Dead.