Agnes Teresa McGlade (also known as Una O'Connor; 23 October 1880 – 4 February 1959) was an Irish actress. She acted almost exclusively in stage plays before becoming a character actress in movies. She worked across Ireland and England as a stage actress for many years. Her plays included The Starlight Express. She was also in the 1930 movie Murder!, an Alfred Hitchcock movie.

O'Connor was born in Belfast. She died from heart disease at age 78 in New York City.

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