Good for them and the rest of the people who were on that flight.

They were smart enough to know that if they did a meet and greet to every person that passed them, that the plane would never get under way on time. It is hard enough to get everyone aboard with all these cheap people who want to carry all their bags on board because of the dumb check in fees. My lord, what a nightmare these fees have made.

I have always respected the fact that first class passengers have the right to board early, be treated to some extra perks, not because who they are, but because they paid for the first class seat. And in this case, they are just people who make their living as actors. I would guess that they just wanted to be like everyone else. To relax and have a nice trip.
I hope you had a nice trip also.