Trivia

She would not work on any radio program sponsored by a company that distributed or manufactured alcohol in any form.

She appeared in four films that have been selected for the National Film Registry by the Library of Congress as being "culturally, historically or aesthetically" significant: The Invisible Man (1933), Bride of Frankenstein (1935), The Informer (1935), and The Adventures of Robin Hood (1938).

Began her acting career on stage at the Abbey Theatre in Dublin, Ireland, and had an extensive stage career prior to being in films.

When Una O'Connor was brought to Hollywood in 1932 to recreate her stage role of Ellen Bridges in "Cavalcade", British critic James Agate wrote that she had established a right to the role "that it would be impertinent and impolitic to contravene.".

Biography in "Actresses of a Certain Character: Forty Familiar Hollywood Faces from the Thirties to the Fifties" by Axel Nissen.

Appeared in eight Oscar Best Picture nominees: Cavalcade (1933), The Barretts of Wimpole Street (1934), David Copperfield (1935), The Informer (1935), The Adventures of Robin Hood (1938), Random Harvest (1942), The Bells of St. Mary's (1945), and Witness for the Prosecution (1957), with Cavalcade being the only winner.

Buried at Calvary Cemetery, Woodside, Queens County, New York. Plot 70-46-16.

Never been Married.