Ian McDonald (born June 25, 1946, in Osterley, Middlesex) is an English multi-instrumental musician, best known as a founding member of progressive rock group King Crimson, formed in 1969, and of the arena rock band Foreigner in 1976. He is well-known as a rock session musician, predominantly as a saxophonist. He also plays flute, vibraphone, keyboards and guitar.

Robert Fripp (born 16 May 1946 in Wimborne Minster, Dorset, England) is a guitarist, record producer and a composer, perhaps best known for being the guitarist for, and only constant member of King Crimson. His work, spanning four decades, encompasses a variety of musical styles. He is married to Toyah Willcox. They currently live in Pershore, Worcestershire, UK. Fripp was ranked 42nd on Rolling Stone magazine's list of the 100 Greatest Guitarists of All Time.

Tony Levin (born June 6 1946, Boston, Massachusetts) is an influential American bass player. He has played with Peter Gabriel, King Crimson, Yes, Liquid Tension Experiment, Pink Floyd, John Lennon, Dire Straits, Joan Armatrading, Alice Cooper, Seal, David Bowie, Deodato, Pandora's Box, Carly Simon, California Guitar Trio, Sarah McLachlan, Kevin Max, The Roches and Paul Simon, among many others.

Adrian Belew (born 'Robert Steven Belew', December 23, 1949, in Covington, Kentucky) is an American guitarist and vocalist (and sometimes drummer, pianist and bass player), perhaps best known for his work as a member of the progressive rock group King Crimson, which he first joined in 1981. He has also released a number of solo albums for Island Records and Atlantic Records, and has worked with many other musicians.

William Scott Bruford (born May 17, 1949 in Sevenoaks, Kent, England), better known as Bill Bruford, is an influential British drummer who is recognised for his forceful, highly precise, polyrhythmic style. He was the original drummer for the highly successful progressive rock group Yes, and has been a prominent figure in the art rock movement since the early 1970s. He has been in many other bands and collaborated on numerous projects, …

Gregory Stuart Lake (born 10 November 1947 in Poole, Dorset, England) is an English bassist, guitarist, vocalist, songwriter and producer, best known as a founding member of King Crimson and Emerson, Lake & Palmer.

Trey Gunn (born December 13, 1960) is a musician and a former member of the band King Crimson, being with them from 1994 to 2003. He initially played Chapman Stick and subsequently diverse types of Warr guitar. He has also performed and recorded with a number of musicians: Robert Fripp, David Sylvian, Vernon Reid, John Paul Jones, Eric Johnson, Michael Brook, David Hykes of the Harmonic Choir and many more. He has released a number of solo albums, …

Peter John Sinfield (born on December 27, 1943 in Fulham Palace Road, Fulham, South-west London, England) is most famously known as the lyricist for early incarnations of King Crimson. He contributed to "In the Court of the Crimson King", "In the Wake of Poseidon", "Lizard" and "Islands", which he also produced. After being asked to leave the band by Robert Fripp after four albums, Sinfield continued to be active in the progressive rock scene.

John Kenneth Wetton (born 12 June 1949, Willington, Derby, Derbyshire, England) is an English singer, bassist and guitarist.

Michael Rex Giles (born on March 1, 1942 in Waterlooville, Hampshire) is an English drummer, best known as the co-founder of King Crimson, drumming in the band's first lineup in 1969. His daughter, model Amanda Giles, is married to Jakko Jakszyk (ex-Level 42). His playing is free and flowing, owing heavily to the jazz tradition while also drawing from rock players such as Mitch Mitchell and Ginger Baker. His playing often had a very orchestral feel as well, …

Mel Collins (born Melvyn Desmond Collins on 5 September, 1947, in the Isle of Man) is a British saxophonist and flautist and prominent session musician. He has worked with an extensive number of musicians, including Alexis Korner, Clannad, Eric Clapton, Bad Company, Dire Straits, Bryan Ferry, Marianne Faithfull, The Rolling Stones and many others, but his most important work was as a member of progressive rock bands King Crimson, Camel, Caravan, …

Peter A. Giles (born 17 June, 1944, in Winton, Bournemouth, Dorset, England) is a bass player and vocalist who, with his brother Michael Giles and Robert Fripp, formed Giles, Giles and Fripp. Peter was replaced by Greg Lake when Fripp and Mike Giles formed King Crimson. Peter later guest appeared on Crimson's second album "In the Wake of Poseidon", …

Gordon Haskell (born Gordon Hionidies, 27 April 1946, in Bournemouth, Dorset, England) was the bassist and vocalist in the transitional King Crimson line-up of 1970. He appeared on the album "Lizard", but quit the group during rehearsals for live work. School friends with Robert Fripp, they previously worked together in an earlier version of League of Gentlemen. Haskell's more folk oriented interests were in conflict with Crimson's sound, so he elected to leave.

Lee Patrick Mastelotto (born September 10, 1955, in Chico, California) is a rock drummer who has worked with Mr. Mister, King Crimson and XTC, among others. Pat started playing the drums at the age of 10. When he was 16, he was playing in popular local bands and, while in school, commuted three hours to Lake Tahoe every night for gigs. Beginning in the 1970s, Pat worked for many bands and as a studio session drummer, most notably for Mr. Mister, Scandal, Al Jarreau, …

David Cross (born April 23 1948) is an electric violinist born in Plymouth, England, best known for playing with progressive rock band King Crimson during the 1970s (particularly on "Larks' Tongues in Aspic", "Starless and Bible Black" and "Red"). He also plays keyboards and Mellotron. Since the 1990s he has led his own band, often writing with drummer Dan Maurer. Former and current King Crimson members John Wetton, Robert Fripp, …

Boz Burrell 1 August 1946 in Lincoln, England–21 September 2006 in Spain was a bass guitarist known for his involvement in bands such as King Crimson and Bad Company. While singer/leader of The Boz People in the mid-1960s, Boz was selected to replace Roger Daltrey in The Who when the remaining members of that band were on the verge of firing Daltrey, which ultimately did not happen. In the late 1960s he released some solo singles as singer (simply as "Boz") In 1971, …

Ian Wallace (born September 29, 1946 in Bury, Lancashire, England, died February 22, 2007 in Los Angeles) was a rock drummer and session musician, best known as a member of progressive rock group King Crimson from 1971-1972. Wallace formed his first band, The Jaguars, at school, before going on to join The Warriors with Jon Anderson in his pre-Yes days. (Wallace later played with Yes once in November 1968 during Bill Bruford's hiatus from the band.) From The Warriors, …

Jamie Muir was a percussionist. He is now a painter. Early in his career, Muir was active in free improvisation, recording and performing with Derek Bailey and Evan Parker in the "Music Improvisation Company" from 1968-71. During this period he also played in the band "Boris" with Don Weller and Jimmy Roche (both later of jazz-rock band "Major Surgery") and Assegai with Alan Gowen and others.

Andy McCulloch was a drummer for several different bands in the 1970s.

Richard W. Palmer-James (born June 11, 1947, in Bournemouth, Dorset) was lyricist for the progressive rock group King Crimson in the early 1970s. The unusual role as a non-music playing member was not without precedent: Palmer-James replaced Peter Sinfield who had also written King Crimson lyrics. Prior to joining King Crimson, he played in the local bands of Bournemouth: The Corvettes, The Palmer-James Group, Tedrad and Ginger Man, …