Maureen Paula O'Sullivan (May 17, 1911 – June 23, 1998) was an Irish actress who played Jane in the Tarzan series of films during the era of Johnny Weissmuller.

O'Sullivan also appeared in films such as The Thin Man (1934), Anna Karenina (1935), A Day at the Races (1937), Pride and Prejudice (1940), and Maisie Was a Lady (1941).

She continued to work in film and theater throughout her life, including appearances in Woody Allen's Hannah and Her Sisters (1986), Coppola's Peggy Sue Got Married (1986), and in Stranded (1987).

In October 1929, she sailed to New York with her mother on the British steamer RMS Baltic, on the way to Hollywood to work for the Fox Film Corporation.

After several roles there and for other studios, she was chosen by Irving Thalberg to appear as Jane Parker in Tarzan the Ape Man, with costar Johnny Weissmuller.

[6] She was featured with William Powell and Myrna Loy in The Thin Man (1934) and played Kitty in Anna Karenina (1935) with Greta Garbo, Fredric March, and Basil Rathbone.

After costarring with the Marx Brothers in A Day at the Races (1937), she appeared as Molly Beaumont in A Yank at Oxford (1938), written partly by F. Scott Fitzgerald.

After appearing in Tarzan's New York Adventure (1942), O'Sullivan asked MGM to release her from her contract so she could care for her husband, John Farrow, who had just left the Navy with typhoid.

O'Sullivan stuck with acting after Farrow's death; she was the Today Girl for NBC for a while, then made the movie version of Never Too Late (1965) for Warner Bros. She was also an executive director of a bridal consulting service, Wediquette International.

In June and July 1972, O'Sullivan was in Denver, Colorado, to star in the Elitch Theatre production of Butterflies are Free with Karen Grassle and Brandon deWilde.

O'Sullivan's first husband was Australian-American writer, award-winning director and Catholic convert John Villiers Farrow, from September 12, 1936, until his death on January 27, 1963.