After performing in musical theater productions as a child, Sean Stewart began his study of jazz dance and tap with Lisa Clark at the age of 10. He began studying ballet two years later with Yanina Cywinska and was a professional ballet dancer by the age of 14, having joined the Joffrey II Dancers in New York under the direction of Jeremy Blanton and Gage Bush Englund. He studied for a year at the Paris Opera Ballet School before joining American Ballet Theatre. Sean performed many roles with ABT including Lankendem and Birbanto in Le Corsaire, Benno in Swan Lake, Benvolio in Romeo and Juliet, the Nutcracker Prince in The Nutcracker, Hortensio in Taming of the Shrew, as well as featured roles in modern and contemporary works by Merce Cunningham, Mark Morris, Twyla Tharp, Christopher Wheeldon, Alexei Ratmansky, Nacho Duato, Lar Lubovitch, Christian Holder, Lauri Stallings, Aszure Barton, Benjamin Millepied and Stanton Welch among many others. He has performed with Lar Lubovitch's company, as well as Complexions, Alabama Ballet and Washington Ballet, and originated a role in The Times, They Are A' Changin', a musical play directed and choreographed by Twyla Tharp. Sean performed as a dance double for the character of Sergei in the film Center Stage.