Evelyn Gardiner, born Enid Mary Griffin, was an English opera singer and actress known for her work as principal contralto in the Gilbert and Sullivan comic operas with the D'Oyly Carte Opera Company and J. C. Williamson, as well as for other stage acting. In 1933, Gardiner earned a pilot's licence and claimed to be only the second British actress ever to do so.

James Cassius Williamson was an American actor and later Australia's foremost impresario, founding the J. C. Williamson's theatrical and production company.