Today, Actors’ Equity Association (Equity) celebrated its eighth annual Swing Day, honoring the “swing” members of a theatrical musical’s cast. Swing members learn multiple parts and are on standby to fill in for other performers who can’t participate on a particular day. Swing members may learn they’re going on stage only moments before a performance begins, and they may have to play multiple parts in the same show, including characters that are different genders, races or ages.