Jon Gadsby QSO (born 1 November 1953) is a New Zealand television comedian and writer, most well known for his role in the comedy series McPhail and Gadsby co-starring alongside David McPhail. Currently he is the editor of Christchurch magazine Avenues.
Gadsby was born in Derbyshire, England; after his family moved to New Zealand he went to school in Invercargill. He studied law at the University of Otago, leaving in his final year to work at Radio Dunedin. He entered television with David McPhail in the comedy A Week of It, before the pair went on to the successful and long-running political satire McPhail and Gadsby.
Gadsby has appeared in numerous television programs, several films, and has written over 20 books, mainly children's. He has also written for the New Zealand Herald, Metro and The Listener, and performs corporate speaking. In 2008, he received a conviction for drunk-driving, after being stopped at a checkpoint in December 2006.
McPhail and Gadsby won the "Best Television Entertainment Programme" Award in 1981, David McPhail and Gadsby were jointly voted the "Best Television Entertainer".
Queen's Service Order, for Public Services to Broadcasting, New Years Honours List 1992.
Best Writers, with David McPhail and A K Grant, at The TV Guide Film and Television Awards in 1996, for the series Letter to Blanchy.