In addition to the unknown singers who found their way to Broadway after becoming household names on "Idol," many theatre actors were also among the thousands of hopefuls who auditioned (and sometimes made it to TV) each year.

Here's a look at some of the "Idol" contestants with Broadway cred! Click through to see them all.

Justin Guarini (Good Vibrations, Women on the Verge, American Idiot, Romeo and Juliet, Wicked) - Season 1 (Runner-Up)

"For Once in My Life"

Tamyra Gray (Bombay Dreams, Rent) - Season 1 (4th place)

"A House is Not a Home" (Burt Bacharach)

"And I Am Telling You I'm Not Going"

Clay Aiken (Spamalot) - Season 2 (Winner)

"Don't Let the Sun Go Down On Me"

"Like a Bridge Over Troubled Water"

Frenchie Davis (Rent) - Season 2 (Disqualified)

"And I Am Telling You I'm Not Going"

Josh Strickland (Tarzan, Play it Cool) - Season 2 (Hollywood Round)

"That's How Love Moves"

Fantasia Barrino (Color Purple, After Midnight) - Season 3 (Winner)

"Summertime"

"What Are You Doing the Rest of Your Life"

Diana DeGarmo (Hairspray, Hair, Toxic Avenger, 9 to 5, Joseph) - Season 3 (Runner-Up)

"Don't Cry Out Loud"

Jennifer Hudson (Color Purple) - Season 3 (7th)

"Circle of Life"

"I Have Nothing"

Katie Webber (Wicked) - Season 3 (Semi-Finals)

"Orange Colored Sky"

Anthony Fedorov (The Fantasticks, Rent, Joseph...) - Season 4 (4th Place)

"Incomplete"

Constantine Maroulis (Wedding Singer, Rock of Ages, Jekyll & Hyde) - Season 4 (6th Place)

"Bohemian Rhapsody"

Taylor Hicks (Grease) - Season 5 (Winner)

"Dancin' in the Dark"

Kathryn McPhee ("Smash") - Season 5 (Runner-Up)

"Somewhere Over the Rainbow"

Ace Young (Grease, Hair) - Season 5 (7th Place)

"Drops of Jupiter"

Jordin Sparks (In the Heights) - Season 6 (Winner)

"I Am Woman"

LaKisha Jones (Color Purple) - Season 6 (4th Place)

"This Isn't a Love Song"

Sanjaya Malakar (Freckleface Strawberry) - Season 6 (7th)

"You Really Got Me"

Sabrina Sloan (Catch Me If You Can) - Season 6

"Never Loved a Man the Way I Love You"

Syesha Mercado (Book of Mormon) - Season 7 (3rd Place)

"One Rock and Roll Too Many" (Starlight Express)

Todrick Hall (Memphis) - Season 9 (Semi-Finals)

"Somebody to Love"

And let's not forget the judges!

Harry Connick, Jr. (Thou Shalt Not, Pajama Game, On a Clear Day) - Seasons 13, 14, 15

"One Fine Thing" "Come By Me"