actresses

starlets

actors, impersonators, mummers, players, thesps, thespians, troupers

barnstormers, enactors, entertainers, performers

leads, leading ladies, leading men, stars

coactors (or co-actors), costars (or co-stars)

extras, spear-carriers, supernumeraries, walk-ons

monologuists (or monologists)

prima donnas, scene-stealers

doubles, understudies

comedians, comediennes, farceurs

tragedians, tragediennes

apes, apers, hams, imitators, impressionists, maskers, masqueraders, mimes, mimics, pantomimes, pantomimists, personators, posers

buffoons, clowns, harlequins, stooges, zanies