Rock stars have back up bands.
Most Broadway musicals have a chorus.
The ballet version of these supporting artists is the corps de ballet; "corps" is French for body.
The corps dancers appear in the big story ballets like "Nutcracker" and "Swan Lake." They create the context for the dramatic action, or the mood of a particular scene.
Dancers in the corps de ballet have to match each other perfectly; the irony is, to get a coveted promotion out of the corps, they need to stand out from the very dancers they need to blend in with.
KUOW's Arts and Culture reporter paid a visit to Pacific Northwest Ballet to learn more about these hard working, and often unsung, dancers.
Correction 9/22/2016: A previous version of the audio incorrectly stated dancer Emma Love Suddarth's age. She is currently 27 years old.