In his book My Story and a comment to writer Robin McGibbon on The Kray Tapes, Ronnie states: "I'm bisexual, not gay.
Ronnie was arrested before he had the chance to marry Monica and, even though she married Ronnie's ex-boyfriend, 59 letters sent to her between May and December 1968 when he was imprisoned show Ronnie still had feelings for her, and his love for her was very clear.