Stuart began working with Clyde as the British music duo Chad & Jeremy in 1962 and they had their first hit song in the UK with "Yesterday's Gone" (1963). That song became a hit in the United States in the following year as part of the British Invasion. The duo had a string of hits in the United States, including "Willow Weep for Me", "Before and After", and their biggest hit, "A Summer Song". Stuart also voiced one of the vultures in the
1967 film adaptation of
The Jungle Book. After some commercial failures and divergent personal ambitions, Chad & Jeremy disbanded in 1968. In the early 1980s, the duo reunited to record a new album and perform concerts, including a multi-band British Invasion nostalgia tour. Following the breakup of Chad & Jeremy, Stuart worked as a staff producer at
A&M Records and musical director for the
Smothers Brothers. On 20 December 2020, Stuart died of pneumonia following a fall. == Personal life ==