Chad Stuart, the bespectacled half of the British Invasion-era Chad and Jeremy, died December 20, 2020. The cause was pneumonia. Stuart turned 79 on Dec. 10. The duo is known for such ’60s hits as “Yesterday’s Gone,” “A Summer Song” and “Willow Weep for Me.”

The exact place of Stuart’s death was not made public. Stuart’s death was confirmed in a post on the duo’s Facebook page, which reads:

“We are deeply saddened to announce the passing of Chad Stuart, a father, a husband, a brother, a grandfather, a friend, a mentor, a teacher and an inspiration to many. Chad developed pneumonia (non-Covid related) after he was admitted to the hospital due to a fall. We ask for love, celebration but also space while the family adjusts to life without this incredible force. The family would like to thank his fans from around the world for the outpouring of birthday wishes and gifts he received every year. Chad took the time to read each and every card. The world has lost a legend today, but his voice will continue to touch our lives through his music.”

David Stuart Chadwick was born on Dec. 10, 1941, in Windermere, Westmorland, England, and met Jeremy Clyde while attending London’s Central School of Speech and Drama. The friends started a singing duo in 1962, briefly split while Clyde pursued a career in theater, then reunited in 1963. Their first hit single in the U.K. was the upbeat folk-rock tune “Yesterday’s Gone,” which also became their first American hit in early 1964, released on the World Artists label. It reached #21 on the national Billboard singles chart.

Jeremy Clyde turned 82 on March 22, 2023.

Watch Chad and Jeremy sing “Yesterday’s Gone” in 1964

Chad and Jeremy enjoyed a brief but prolific run. Their second American hit, the gorgeous ballad “A Summer Song,” became their most successful, peaking at #7 in the late summer of 1964. Their cover of the 1930s standard “Willow Weep for Me” reached #15, and was followed by “If I Loved You” (#23). Switching to Columbia Records, the pair’s next hit, “Before and After,” became their final top 20 entry, peaking at #17 in the spring of 1965.

Related: 12 “Lost” British Invasion hits

They continued to release singles and albums on Columbia, with a couple of those LPs, notably 1967’s psychedelic Of Cabbages and Kings, finding some favor on FM rock radio.

Chad and Jeremy also made appearances on a number of American television programs, including the sitcoms The Dick Van Dyke Show and The Patty Duke Show. They even appeared on the Western Laredo and, notably, on two episodes of Batman.

Here they are, singing “A Teenage Failure,” on Batman

By late 1968, however, the duo’s run had come to an end and both Stuart and Clyde went on to pursue separate careers. There were numerous reunions later, starting with the 1982 album Chad Stuart & Jeremy Clyde, and they also starred in a West End London musical in the ’80s. Their last album together was 2010’s Fifty Years On.

Stuart subsequently retired from music and moved to Idaho, where he remained until his passing. Clyde, meanwhile, teamed for a few tours with Peter Asher, half of the similar English duo Peter and Gordon.

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Watch Chad and Jeremy perform “A Summer Song” on American Bandstand in 1964

Related: Musicians we lost in 2020