Figurant

(n. masc.) One who dances at the opera, not singly, but in groups or figures; an accessory character on the stage, who figures in its scenes, but has nothing to say; hence, one who figures in any scene, without taking a prominent part.

Thesaurus Entries

ballet dancer, ballet girl, ballroom dancer, choral dancer, chorus boy, chorus girl, clog dancer, coryphee, dancer, dancing girl, danseur, danseur noble, danseuse, figurant, figurante, geisha, geisha girl, heel-and-toe dancer, hoofer, hula girl, nautch girl, square-dancer, terpsichorean