Peggy Cummins (born Augusta Margaret Diane Fuller; 18 December 1925 – 29 December 2017) was an Irish actress, born in Wales, who is best known for her performance in Joseph H. Lewis's Gun Crazy (1950), playing a trigger-happy femme fatale, who robs banks with her lover. In 2020, she was listed at number 16 on The Irish Times list of Ireland's greatest film actors.