What actors and actresses appeared in The Big Bondi Beach Flash Mob - 2009?

There is no record of a "The Big Bondi Beach Flash Mob" event in 2009 or any other year. Flash mobs are usually spontaneous and unplanned, making it unlikely to be a scripted event with professional actors.

It's possible you're thinking of a different event or perhaps a fictional flash mob depicted in a movie or TV show.

If you can provide more information, such as the specific movie or show, or any details about the event you're referencing, I can help you find the actors involved.