Gary Michael Langan (born 19 April 1956) is an English engineer, record producer, mixer and musician.
In 1983, Langan co-founded the ZTT Records label with Trevor Horn, Paul Morley and Jill Sinclair.
2005 saw Langan creating the SACD mix for the re-issue of Jeff Wayne's Musical Version of The War of the Worlds.
In April 2009, Langan took charge of the front of house duties for ABC at the Royal Albert Hall.
Anne Dudley arranged the songs for, and conducted the BBC Concert Orchestra, Trevor Horn supplied a speech and backing vocals.