Gordon Trueman Riviere Waller (4 June 1945 – 17 July 2009) was a British singer–songwriter–guitarist, best known as Gordon of the international 1960s Pop music duo Peter and Gordon, whose biggest hit was the No. 1 million-selling classic "A World Without Love".
Waller was born in Braemar, Scotland. While attending Westminster School, he met fellow student Peter Asher, and they began playing together as a duo – Peter and Gordon. Asher mentioned in a 2006 interview that "Our voices are quite different, Gordon's and mine, but we tried singing together experimentally and we found that we could achieve this very nice harmony."
Asher is the older brother of actress and businesswoman Jane Asher, who in the mid-1960s was girlfriend of The Beatles' Paul McCartney. Through this connection he and Waller were often given unrecorded Lennon–McCartney songs to perform, most notably their first and biggest hit, "A World Without Love" (1964). In the mid-1970s Waller worked as a photocopier salesman in Bedford.