Convent-educated Mary Josephine Dunn got her start in the chorus line of 'Good Morning, Dearie' at the age of 15. She was briefly in the Ziegfeld Follies and, in 1924, had a walk-on in 'Dear Sir' on Broadway. Two years later, she was picked by a talent scout to join the Paramount acting school for hopeful young debutantes. A ravishing blue-eyed blonde, she made an impression in D.W. Griffith's The Sorrows of Satan (1926), Amerikalı bakireler (1929) and had good reviews in the Ernst Lubitsch-directed operetta Seninle Bir Saat (1932) as Mademoiselle Martel. She had a rare co-starring role in Safety in Numbers (1930) alongside Carole Lombard, but third-billing was as good as it got for Josephine. By early 1933, she was reduced to playing vamps and mercenary wives and retired from the screen five years later, making sporadic appearances in summer stock during the 1940's.