I hear today that one of my principals was up all night with food poisoning. He tells me he wants to perform today, but isn't up to the physical challenge of running around related to one particular quick change for a non-speaking role. He normally plays four different characters over the course of the play. He wants me to call in his understudy for that one bit part, and he'll perform the rest.
Makes sense to me. My question is, do we do any announcements or signage? My inclination is not, since the understudy is non-union and the role is a bit part, not even mentioned in the playbill.
What do you all think?