understudying

MR: Now, you both were child prodigies as performers--Susan, you were understudying on Broadway at age six, and Derek you were turning heads in the music industry at age nine.

Mike Ragogna: Keb' Mo's "...Enchilada," Plus Chats with Susan Tedeschi, Derek Trucks, Alex Miller, Flogging Molly's Dave King, and Lindi Ortega Mike Ragogna 2011

You do know he was already getting cast understudying Broadway tours, right?

Adam Lambert wants to act? What should he do? | EW.com 2009

MR: Now, you both were child prodigies as performers--Susan, you were understudying on Broadway at age six, and Derek you were turning heads in the music industry at age nine.

Mike Ragogna: Keb' Mo's "...Enchilada," Plus Chats with Susan Tedeschi, Derek Trucks, Alex Miller, Flogging Molly's Dave King, and Lindi Ortega Mike Ragogna 2011

Dracula - Frank Langella (altho I saw Raul Julia on Broadway, ironically understudying Langella that night).

Davy Crockett, the Green Hornet, the Phantom and other heroes of my youth who werent really heroes of my youth 2010

After understudying Ethel Merman on Broadway and being part of Martha Graham's dance company, Betty got famous for doing comical specialty songs, starting with "South America, Take It Away" from her huge Broadway hit, "Call Me Mister" that opened 65 years ago.

Danny Miller: Remembering Betty Garrett Danny Miller 2011

MR: Now, you both were child prodigies as performers--Susan, you were understudying on Broadway at age six, and Derek you were turning heads in the music industry at age nine.

Mike Ragogna: Keb' Mo's "...Enchilada," Plus Chats with Susan Tedeschi, Derek Trucks, Alex Miller, Flogging Molly's Dave King, and Lindi Ortega Mike Ragogna 2011

MR: Now, you both were child prodigies as performers--Susan, you were understudying on Broadway at age six, and Derek you were turning heads in the music industry at age nine.

Mike Ragogna: Keb' Mo's "...Enchilada," Plus Chats with Susan Tedeschi, Derek Trucks, Alex Miller, Flogging Molly's Dave King, and Lindi Ortega Mike Ragogna 2011

After understudying Ethel Merman on Broadway and being part of Martha Graham's dance company, Betty got famous for doing comical specialty songs, starting with "South America, Take It Away" from her huge Broadway hit, "Call Me Mister" that opened 65 years ago.

Danny Miller: Remembering Betty Garrett Danny Miller 2011

"The role is nebulous," and includes understudying for the conductor, says Perry So, assistant conductor with the Hong Kong Philharmonic Orchestra.

So You Want to Be a …? Sally Robinson 2010

Now, he's understudying a Tony-nominated star, Alfred Molina, in "Red," a play about abstract expressionist painter Mark Rothko.

Waiting In The Wings With Broadway's Understudies 2010