The documentary had its world premiere in February 2025 at the Santa Barbara International Film Festival. Directed by Andre Relis and Nick Mead, the film is based on Glen Matlock's 1990 book of the same name. The documentary aims to tell the story of the Sex Pistols from the perspective of a founding member who co-wrote more than ten of the twelve songs on the band's only studio album, "Never Mind the Bollocks, Here's the Sex Pistols." Matlock is credited with iconic songs such as "Anarchy in the U.K." and "God Save the Queen".

According to the director, the film promises an honest and in-depth look into a group of malcontents who were determined to change the music industry and confront social hypocrisy and outdated conventions. Matlock's memoir details the atmosphere of the early 1970s in the United Kingdom and also reveals information such as the story of Wally Nightingale, the "lost" original member of the Sex Pistols, guitarist Steve Jones's thefts, the search for a singer, and the explosive emergence of the punk scene. The film gives the audience the opportunity to get to know not only the story of a member of the band, but also of a man whose contribution to the band's success has been extraordinarily underestimated.

In addition to Matlock, the documentary features other members of the Sex Pistols, Steve Jones and drummer Paul Cook. In addition to them, well-known figures in punk and rock music such as Billy Idol, members of Blondie, and members of the bands The Damned and the Dead Boys also appear.

Glen Matlock left the Sex Pistols in early 1977 and was replaced by Sid Vicious. Although the band's original lineup was short-lived, their impact on the history of rock music is undisputed.

Following its Santa Barbara premiere, "I Was a Teenage Sex Pistol" will also be screened in the United Kingdom at the Doc'n Roll Film Festival in October 2025.