Her first stage appearance was at age 12 in a minor role in
Last Days of Pompeii, presented in the theater managed by her father in
Rochester, New York in the early 1840s. On May 18, 1846, she made her New York debut at the
Bowery Theatre in the principal role of Julia, in Knowles’ comedy
The Hunchback, and on October 26, 1846, she reprised the role at Boston's
National Theater. Dean subsequently played Julia in a successful Southern tour of
The Hunchback. In the March 7, 1868 edition of
The New York Times, the paper said of her debut performance: [This was] a part that she almost monopolized on the American stage, for the immediately succeeding years. Speaking of this debut and of Julia Dean's early years, Ireland in his
History of the New York Stage wrote: "Youthful, graceful, delicately pretty, with a slight Hibernian cast of features, she at once awakened the public interest, and her intelligence and graceful study lent a charm to her performance which soon carried her to a point of popularity rarely exceeded". Lucretia Borgia, Medea, Marco in
Charles Selby's
The Marble Heart, Lady Teazle,
Peg Woffington, Bianca in
Fazio, Mary Stillworth in ''
Mary's Birthday and Pauline Deschapelles in The Lady of Lyons''. Dean was the original Norma in
Epes Sargent's
Priestess, and the first to play Leonor in
George Henry Boker's tragedy about
Eleanor de Guzmán. Dean lived in the West for a number of years, primarily in San Francisco and Salt Lake City. There she became a popular attraction throughout the Western United States and British Columbia. She eventually returned east not long after the close of the
American Civil War in tours that at times would find success elusive. Her final noteworthy roles were Ann Catherick and Laura Fairlie, in a dramatization of
Wilkie Collins' novel
The Woman in White. Of her forte, ''
Appletons' Cyclopaedia of American Biography said in 1898, She excelled in juvenile tragedy and high comedy parts''. ==Marriage==