Ian McDonald (guitar, keyboards and vocals) and Michael Giles (percussion and vocals) were members of the original King Crimson line-up, and
were featured performers on the band's debut album, In the Court of the Crimson King (1969). Both left the group at the end of its first
North American tour in 1969, although Giles appeared on the second King Crimson album, In the Wake of Poseidon (1970), as a session
musician. Two other King Crimson members also worked on McDonald and Giles: Peter Giles (bass) and lyricist Peter Sinfield.
Courtesy of Wikipedia