Born: May 1, 1855, London, England. She grew up as the adopted daughter of Scottish song writer and journalist Charles Mackay.
Died: April 21, 1924, Stratford-upon-Avon, England.
Buried: Evesham Road Cemetery, Stratford-upon-Avon, England.
Pseudonym: Marie Corelli.
Mills was educated at a convent school in Paris (1866–70).