When the king enjoys his own again (sometimes known as The king shall enjoy his own again) is a Cavalier ballad written by Martin Parker during the English Civil War (first published in 1643). It was later adopted by Jacobites. According to the historian Dr. Bernard Capp, this song was perhaps the most popular song in mid-seventeenth century England. The eighteenth century critic Joseph Ritson called it "the most famous and popular air ever heard in this country".

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