John Joseph Lydon (born 31 January 1956), also known by his former stage name Johnny Rotten, is an English singer-songwriter, television presenter and painter, best known as the lead singer of punk rock band the Sex Pistols from 1975 until 1978, and again for various revivals during the 1990s and 2000s. He is the lead singer of the post-punk band Public Image Ltd (PiL), which he founded and fronted from 1978 until 1993, and again since 2009. Throughout his career, Lydon has made controversial or dismissive comments about the British Royal Family and other subjects.

There has been a recent revival of a 1980s movement to have Lydon knighted for his achievements with the Sex Pistols – even though he has since turned down an MBE (Member of the Most Excellent Order of the British Empire) for his services to music. In 2002 he was named among the 100 Greatest Britons following a UK-wide vote. Q Magazine remarked that "somehow he's assumed the status of national treasure."