Mary played Janet in seasons 3, 4 and 5 of the hit TV Series Love/Hate for which she was nominated best leading actress and best supporting actress at the IFTAS.
Other notable productions include The Magdalene Sisters, Adam and Paul and Penny Dreadful.
Mary can next be seen playing the role of Aline Lambert the TV mini series Dead Still for RTE and Acorn TV (USA) due for release in Spring 2020.
Mary will begin filming the role of Shiela - the vampire queen in the feature film Let the Wrong One In which begins filming in late March 2020.
Holy Mary by Eoin Colfer will return in May 2020 after last years hugely successful tour. It will be performed at the Gaiety Theatre before a national tour.