Under the management of Malcolm McLaren, the band attracted controversies that both captivated and appalled Britain. Matlock was replaced by Sid Vicious in early 1977. The Sex Pistols originally comprised vocalist John Lydon (known at the time by his stage name 'Johnny Rotten'), guitarist Steve Jones, drummer Paul Cook and bassist Glen Matlock. Their fashion and hairstyles have been credited as a significant influence on punk image, and they are often associated with anarchism within music. They were responsible for initiating the punk movement in the United Kingdom and inspiring many later punk and alternative rock musicians. Although their initial career lasted just two and a half years, they are regarded as one of the most groundbreaking acts in the history of popular music. The Sex Pistols were an English punk rock band that formed in London in 1975.