Mary Conlon appeared in EastEnders from January 1991 to September 1991 as tourist board representive Eibhlin O'Donnell.
Before EastEnders she appeared in The Upchat Connection, The Walls of Jericho, The Play on One, Shadow of the Noose and Five Children and It. After EastEnders she has appeared in Anna Lee, Crocodile Shoes, Casualty, Melissa, Chalk, Doctors, Strange, Down to Earth and Holby City.