I dont know how it is now but the assistant stage manager had to understudy several parts. You had to be ready to go on at any time if the actor couldnt make it to the play. I didnt think anything of it.
Glenn FordSome actors count their lines as soon as they receive a script. I'm the opposite. I try to see how many lines I can whittle down. You can say just as much in 4 as you can in 14.
Glenn Ford