Some actors get to the theater well before their 1 hour call. When I'm conducting interviews for BWW, there are some actors who invite me to their dressing rooms at 4:30 or 5 for the interview when they have a 7 or 8 PM show. It's obvious that other actors are already there, so it's not just the interviewee who is the early-bird.
"Long live God!" (GODSPELL)