Murphy joined American Ballet Theatre at the age of seventeen as a member of the corps de ballet in August 1996, and was promoted to soloist in 1999 and then to principal dancer in 2002. Her repertoire with ABT includes Polyhymnia in Apollo, Nikiya and Gamzatti in La Bayadère, Cinderella in Cinderella, Swanilda in Coppélia, Medora and Gulnare in Le Corsaire, Kitri in Don Quixote, Titania in The Dream, the Accused in Fall River Legend, second girl in Fancy Free, Lise in La Fille mal gardée, the pas de deux Flames of Paris, Grand Pas Classique, Myrtha in Giselle, His Memory and His Experiences in HereAfter, the Queen of Hearts in Jeu de Cartes, Manon in Lady of the Camellias, Lescaut’s Mistress in Manon, the Sugar Plum Fairy in The Nutcracker, Desdemona in Othello, Hagar in Pillar of Fire, Raymonda in Raymonda, Juliet in Romeo and Juliet, Princess Aurora and the Lilac Fairy in The Sleeping Beauty, Odette-Odile in Swan Lake, Sylvia in Sylvia, the first and third movements in Symphony in C, the Tchaikovsky Pas de Deux, and the ballerina in Theme and Variations.
She has also performed leading roles in Allegro Brillante, Ballet Imperial, Ballo della Regina, Baroque Game, Birthday Offering, Paul Taylor’s Black Tuesday,
The Brahms-Haydn Variations, Clear, Désir, Diversion of Angels, Drink
To Me Only With Thine Eyes, Études, From Here On Out, Gong, In The Upper
Room, Meadow, Les Patineurs, Pretty Good Year, Push Comes to Shove,
Sinfonietta, Les Sylphides, Symphonie Concertante and The Bright Stream.
She has additionally performed featured roles in Company B, The
Elements, Overgrown Path and Without Words.
In 2011 long time boyfriend Ethan Stiefel propossed to her on stage after their performance.