The Kray Twins, Ronnie and Reggie, were notorious British gangsters who operated in London during the 1950s and 1960s. They led a criminal organization involved in various illegal activities, including extortion, robbery, and violence. The twins were known for their flamboyant lifestyle and connections to the London underworld, gaining a reputation for both their charm and brutality. The Krays were eventually arrested and convicted for murder in 1969, leading to life sentences in prison. Their story has been the subject of numerous books, films, and documentaries, highlighting their impact on British crime culture and the public's fascination with their lives.