Gallery: American Idols On Broadway

Young has appeared on Broadway twice: first as Kenickie in Grease, and most recently as Berger in Hair.

Fedorov took over the role of Matt in the off-Broadway revival of The Fantasticks in 2007.

Clay starred as Sir Robin in Spamalot.

Constantine originated the role of Drew in Rock of Ages, for which he garnered a Tony nomination for Best Actor in a Musical; he also previously appeared as Sammy in The Wedding Singer.

DeGarmo appeared as Sheila in Hair opposite fellow Idol alum Ace Young. She had also been part of the cast of Hairspray as Penny Pingleton.

Fantasia made a big splash as Celie in The Color Purple, though due to medical issues, she missed nearly 50 performances.

Frenchie sang the "Seasons of Love" solo in Rent in 2003.

Jordin played Nina in In the Heights.

Justin has just joined the cast of American Idiot as Will.

Sanjaya is currently appearing off-Broadway in the adaptation of Julianne Moore's children's book Freckleface Strawberry.

Gray has earned her Broadway stripes in two shows: first as Priya in Bombay Dreams, then as Mimi in Rent.

Hicks won the featured role of Teen Angel in the revival of Grease.

Josh Strickland wasn't a finalist, but he played Tarzan in Disney's Broadway production of Tarzan; Amy Adams played the Narrator in the national tour of Joseph and the Amazing Technicolor Dreamcoat with Patrick Cassidy; and Ruben Studdard played Fats Waller in the national tour of Ain't Misbheavin'.