Sang lead vocals on the Pink Floyd track "Have A Cigar" from the 1975 album "Wish You Were Here". Sining the song, Roy 'plays the part' of a shady music industry mogul, and makes reference to the band with the line, "By the way, which one is Pink?".
The bluesy Led Zeppelin song "Hats Off (To Roy Harper)" is named after him. Appears on the acoustic side of Led Zeppelin III.