Harriell has been married to actor Robert Harriell since 1995.
Harriell landed the role of Mimi in the hit musical Rent on April 4, 1997, marking her Broadway debut. She performed in Rent until June 6, 1999. Her next Broadway credit was Lennon at the Broadhurst Theatre. She was last seen playing Vanessa in In the Heights, having taken over from Karen Olivo on November 18, 2008. She stayed with the role until the Broadway production closed on January 9, 2011
