Sebastian Arcelus (born November 5, 1976) is an American actor. He has made a career in theatre on Broadway, regionally, and internationally. He made his Broadway debut in Rent, first as a swing, covering the male ensemble roles as well as Mark and Roger, and then as Roger. He starred as Jan in the original cast of the Beach Boys musical, Good Vibrations. He played Fiyero on the first national tour of Wicked from January 3 until October 3, 2006. He then reprised the role of Fiyero in the Broadway production from January 9 to December 16, 2007.