The gangly Lloyd made his film debut in 1960, and appeared in numerous film and television comedies during the 1960s and 1970s, notably Rowan & Martin's Laugh-In as a regular performer in 1969-70. His first major success as a comedy writer was with Are You Being Served? in 1972, on which he worked with David Croft. They subsequently produced 'Allo 'Allo!, which was equally popular in the UK, and Are You being Served? spinoff Grace & Favour in 1992. Jeremy also wrote the poem/lyrics for the popular "Captain Beaky" album and books in 1980.
He has been the subject of a persistent urban legend which claims that he was invited to a dinner party at the home of Sharon Tate on the night that she was murdered by followers of Charles Manson. There seems to be no truth in this myth, as Lloyd was performing at a live show in New York during the week of Tate's death, and there is no evidence to suggest that he had ever met Tate or her husband, Roman Polanski while she was still living.
Lloyd's first marriage (1955) to the model Dawn Bailey lasted seven years. After the marriage was dissolved, Lloyd was briefly married to the actress Joanna Lumley.