Ronald "Ronnie" Kray and Reginald "Reggie" Kray were English organised crime figures, and identical twin brothers from Haggerston, who were prominent from the late 1950s until their arrest in 1968. Their gang, known as the Firm, was based in the Bethnal Green, where the Kray twins lived. They were involved in murder, armed robbery, arson, protection rackets, gambling and assaults. At their peak in the 1960s, they gained a certain measure of celebrity status by mixing with prominent members of London society, being photographed by David Bailey and interviewed on television.

Haggerston is an area in London, England and is located in the London Borough of Hackney. It is in East London and part of the East End. There is an electoral ward called Haggerston within the borough.