The Sex Pistols were an English punk rock band that formed in London in 1975. 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. They were responsible for initiating the punk movement in the United Kingdom and inspiring many later punk and alternative rock musicians. Their fashion and hairstyles have been credited as a significant influence on punk image, and they are often associated with anarchism within music.