Stephen starred as Teen Angel in Grease, which began previews at Broadway's Brooks Atkinson Theatre (256 West 47th Street) on July 24, 2007 and officially opened on August 19, 2007. He left the cast June 5, 2008, but returned from September 9, 2008 until the show closed on Jan 4, 2009.

Grease also featured Max Crumm and Laura Osnes as Danny and Sandy; Crumm and Osnes were cast through an NBC reality show, "Grease: You’re the One That I Want".

Stephen can be heard on the new Broadway cast recording of Grease which is available at amazon.com as well as many other sources.