Linda Calvey (born Linda E P Welford, 8 April 1948 in Ilford, Essex, England) is an English murderer, author and former armed robber, convicted and sentenced to life imprisonment for killing her lover Ronnie Cook. She was known as the "Black Widow" because all of her lovers ended up either dead or in prison. Calvey was released on parole in 2008. Calvey continues to deny committing the murder, blaming it on her ex-lover, but her claims have been described as "cynical and self-serving".