The original line-up included Humphries, Jimmy Bilsbury, and Malcolm Magaron as lead vocals, supported by Jürgen Drews, Judy Archer, En David, Myrna David, Peggy Evers, Dornee Edwards, Henner Hoier, Heike Kloen, Liz Mitchell, Victor Scott and Tina Werner.

[6][7] Additional members included Mitchell, later front woman with Boney M., and Lawton, who also sang for the German progressive/hard rock band Lucifer's Friend and would go on to be the frontman for Uriah Heep.

In 1974 Les Humphries Singers starred in the German movie Es knallt - und die Engel singen directed by Roberto Leoni (as Butch Lion) and produced by Dieter Geissler Filmproduktion.

[citation needed] The Les Humphries Singers at the time brought something from the flair of the hippie movement into contemporary German-produced (but English-sung) pop music, especially due to their mixed ethnic background and peculiar fashion sense.

The former members, Jürgen Drews, Tina Kemp-Werner, Judy Archer and Peggy Evers-Hartig, formed a group called the "Les Humphries Singers Reunion" in 2009.