American actress & vocalist. Née Margaret Virginia Sullivan. Born 10 April 1851, San Francisco, California, USA. Daughter of James Edward Sullivan and Bridget Mary Whelan. Married JC Williamson (actor & manager), 2 February 1873, San Francisco, California, USA (div. 1899), (2) HR Roberts (actor), 12 April 1902, New York City, New York, USA. Died 15 March 1926, San Francisco, California, USA.
On stage in Australia from 1874, performing in G&S, comedy, drama, pantomime. One of her early successes was in Struck Oil alongside JC Williamson.