Gavan O'Herlihy was an American actor.
O'Herlihy's big break was being cast as Ron Howard's older brother, Chuck, on ABC's Happy Days. He played the role for seven episodes, and then the character was sent off to college, and eventually was written out of the series.
After that, O'Herlihy guest starred on several television series including Marcus Welby, M.D.; The Bionic Woman; Matt Houston; Star Trek: Voyager; and Rich Man, Poor Man.
He relocated to England to star on the 1982 ITV series We’ll Meet Again and worked with his father, actor Dan O'Herlihy, on ABC’s Twin Peaks in 1990-91.
O'Herlihy died September 15, 2021 in Bath, England. He was 70.