King Crimson is an English progressive rock band formed in London in 1968 by guitarist Robert Fripp and a group of collaborators. Known for their constantly evolving lineup—Fripp being the only constant member—King Crimson pioneered the progressive rock genre with a groundbreaking fusion of classical, jazz, heavy metal, experimental and electronic music. Their influential debut album, In the Court of the Crimson King, quickly became a genre landmark. Throughout their history, King Crimson have gone through numerous lineup changes and creative phases, each bringing fresh ideas and musical directions. Notable periods include their early 1970s run with innovative albums like Larks' Tongues in Aspic and Red, their 1980s reinvention with Adrian Belew and Tony Levin, and later lineups featuring multiple drummers and new collaborators. Renowned for their experimental approach, complex compositions, and powerful live performances, King Crimson has inspired generations of artists across many genres. The band maintains a dedicated cult following, and their influence on progressive and experimental music remains strong. After decades of activity and reinvention, King Crimson continues to leave a unique and lasting mark on the world of music.