Colette O'Neil was born on October 24, 1895 in Castewellan Castle, County Down, Ireland. She was an actress, known for Hindle Wakes (1918). She was married to Miles Malleson. She died on October 5, 1975 in Bury St. Edmonds, Suffolk, England, UK.
By agreement with her husband, Miles Malleson, they had an open
marriage and she became the mistress of philosopher Bertrand Russell.
She was born as Lady Constance Annesley, being one of the daughters of
the Fifth Earl Annesley. Lady Mabel Annesley, her sister, also had a
successful career, as an artist.