For the ice hockey player, see Errol Thompson (ice hockey)

Errol Thompson (December 29, 1948 – November 13, 2004), better known as "ET", was a record producer, audio engineer, and one of the first studio engineers to be involved in dub music. He was fellow producer Joe Gibbs' partner—the two were known collectively as the Mighty Two. In the 1970s, he worked (along with Niney) as an engineer at Randy's Studio 17, in Kingston, Jamaica. Thompson engineering the first reggae album without vocals, Derrick Harriott and the Crystalites' The Undertaker, released in 1970. Thompson also engineered tracks by Bob Marley, The Abyssinians, Augustus Pablo, Big Youth, Prince Far I, Culture, Dennis Brown, Yellowman, Frankie Paul and Burning Spear. In addition, he produced work by I-Roy, Cornell Campbell, Freddie McGregor and Barrington Levy. Thompson also worked with producer, Clive Chin. His final project, "the Hard Times Riddim", co-produced with Stephen Gibson, son of partner Joe Gibbs, was instrumental in creating a resurgence in Dancehall. The album included many key reggae performers of the time including, Capleton, I Wayne, Richie Spice, Chuck Fenda and Luciano.

Later in life, he moved away from the music industry and managed a supermarket in North Parade, downtown Kingston. Thompson died, after numerous strokes, on November 13, 2004, at the age of 55.