David Essex (born David Albert Cook; 23 July 1947) is an English singer-songwriter and actor. From 1973 to 1994, he had nineteen Top-40 singles in the UK (including two number ones) and sixteen Top-40 albums. Internationally, he had the most success with his 1973 single "Rock On". Essex has also had an extensive career as an actor, which includes a nomination for the BAFTA Award for Most Promising Newcomer to Leading Film Roles for the film That'll Be the Day (1973) and a nomination for the Laurence Olivier Award for Best Performance in a Musical for Evita in 1978.
