Twin brothers Ronald "Ronnie" Kray and Reginald "Reggie" Kray were English gangsters who were the foremost perpetrators of organised crime in the East End of London during the 1950s and 1960s. With their gang, the Firm, the Krays were involved in armed robberies, arson, protection rackets, assaults, and the murders of Jack "the Hat" McVitie and George Cornell.