Keith Stuart Brian Reid (19 October 1946 – 23 March 2023)[1][2] was an English lyricist and songwriter.

He met Gary Brooker, lead singer with Procol Harum, with whom he co-wrote most of the band's songs (some music was written by organist Matthew Fisher and by guitarist Robin Trower), in 1966.

They began collaborating, and their composition "A Whiter Shade of Pale", Procol Harum's first single, was released in 1967.

Reid also wrote the lyrics for two songs by the French singer Michel Polnareff in 1966 ("You'll Be On My Mind" and "Time Will Tell"), and was co-writer for the John Farnham hit "You're the Voice" (1986).

Reid wrote the lyrics for the songs, which were performed by a variety of musicians, including Southside Johnny, Chris Thompson, John Waite and Michael Saxell.