Mary Fanny Cathcart (3 August 1833 – 3 January 1880), was an Australian stage actress, active between 1853 and 1878.

She arrived in Melbourne in Australia as a member of Gustavus Brooke's travelling theatre company in 1853.

[4] Cathcart was famous in mid 19th-century Australia for both her comedy and Shakespearean roles.

Cathcart died at her home in the Melbourne suburb of Carlton on 3 January 1880,[5] survived by her second husband.

Cathcart Close in the Canberra suburb of Chisholm is named in her honour.