Blood Brothers is a musical with book, lyrics, and music by Willy Russell and was produced by Bill Kenwright until his death in 2023. The story is a contemporary nature versus nurture plot, revolving around fraternal twins Mickey and Eddie, who were separated at birth, one subsequently being raised in a wealthy family, the other in a poor family. The different environments take the twins to opposite ends of the social spectrum, one becoming a councillor, and the other unemployed and in prison. They both fall in love with the same girl, causing a rift in their friendship and leading to the tragic death of both brothers. Russell says that his work was based on a one-act play that he read as a child "about two babies switched at birth ... it became the seed for Blood Brothers."