Have you ever seen an actor's family at shows...usually you can tell if they give the loudest applause out of the amount going on at the time.
When I saw Thoroughly Modern Millie, it happened to be Sheryl Lee Ralph's last day, and when she came for her bow, I heard people clapping and saying "Yay!!!" really loud, and looked behind me, and saw that it was probably her family.
Also, on the national tour of the Producers, I thought I saw Michael McCormick's (Franz Liebkind) family.
"We like to snark around here. Sometimes we actually talk about theater...but we try not to let that get in our way." - dramamama611