"Jealous Guy" is a song written and originally recorded by the English rock musician John Lennon from his second studio album Imagine (1971). Not released as a single during Lennon's lifetime, it became an international hit in a version by Roxy Music issued in early 1981; this version reached #1 in the UK and Australia, and was a top 10 hit in several European countries. Lennon's own version was subsequently issued as a single, and charted in the US and UK.

John Winston Ono Lennon was an English singer, songwriter and musician. He gained worldwide fame as the founder, co-songwriter, co-lead vocalist and rhythm guitarist of the Beatles. His work included music, writing, drawings and film. His songwriting partnership with Paul McCartney remains the most successful in history.