Born Marianne Joan Elliott-Said in London, England, she rose to prominence in the late 1970s as the lead singer of the punk band X-Ray Spex. Her distinctive vocal style and unconventional aesthetic helped define the sound and visual identity of the era's burgeoning punk scene.

Her work was characterized by a sharp, satirical approach to consumerism and identity, often delivered through high-energy performances and unconventional fashion choices. She remained a significant cultural figure for her influence on the riot grrrl movement and her role in challenging gender norms within the music industry.