Elvis Costello (born Declan Patrick MacManus, 25 August 1954) is an English singer-songwriter. He came to prominence as an early participant in London's pub rock scene in the mid-1970s, and later became associated with the punk rock and New Wave musical genres. Steeped in word play, the vocabulary of Costello's lyrics is broader than that of most popular songs, and his music has drawn on many diverse genres; the critic Stephen Thomas Erlewine describes him as a "pop encyclopedia," able to "reinvent the past in his own image".

Costello was born Declan Patrick MacManus in St Mary's Hospital, London, the son of Lillian (née Ablett) and Ross MacManus, a musician and bandleader. He is of Irish heritage. Costello lived in Twickenham, attending what is now St Mark's Catholic Secondary School in neighbouring Hounslow. With a musically inclined father (his father sang with The Joe Loss Orchestra), Costello's first broadcast recording was alongside his dad in a television commercial for R. White's Lemonade ("I'm a Secret Lemonade Drinker"). His father wrote and sang the song; Costello provided backing vocals. The ad won a silver award at the 1974 International Advertising Festival.

Costello moved with his Liverpool-born mother to Birkenhead in 1971. There, he formed his first band, a folk duo called Rusty with Allan Mayes. After completing secondary school at St. Francis Xavier's College, he moved back to London where he next formed a band called Flip City, which had a style very much in the pub rock vein. They were active from 1974 through early 1976. Around this time, Costello adopted the stage name D.P. Costello. His father had performed under the name Day Costello, and Elvis has said in interviews that he took this name as a tribute to his father.