The Fleur de Lys (initially Les Fleur (sic) de Lys) were a British band originally formed in late 1964, in Southampton, Hampshire, England. They recorded singles beginning in 1965 in the transitional Beat to psychedelic music genre, later known as freakbeat. The band had varied line-ups; only drummer Keith Guster was a member throughout their history. They finally disbanded in 1969. Keyboardist Pete Sears went on to play on several early Rod Stewart recordings, and was a founding member of Jefferson Starship.

Fleur de Lys were managed by Atlantic Records' Frank Fenter, who had also discovered Sharon Tandy, the first white artist to record for Stax Records. Sweet Feeling's manager Howard Conder recruited the band to record the song "Reflections of Charles Brown", under the name 'Rupert's People'. This single, heavily reminiscent of Procol Harum's "A Whiter Shade of Pale", failed to chart (except in Australia where it reached No. 13 in August 1967) despite receiving airplay but became a collectable item according to Record Collector Magazine (Issue c. 1992). The band recorded a B-side, "Hold On" which was their last work with Conder.