Keith Hopwood (born 26 October 1946) is an English musician, singer-songwriter, composer, businessman and record producer, who served as the rhythm guitarist and backing vocals for the 1960s pop band, Herman's Hermits. Hopwood also served as a keyboardist, singer and guitarist for the post-Peter Noone outfit, Sour Mash, which recorded an unreleased album, A Whale of a Tale for RCA.