Green Start?

Probably a really stupid question - but... I've got my good for age time and will start the FLM from the Green Start. Which I've heard is really good, not as crowded and all the celebs start from there, so some celebrity watching may be in order. Goodie!!! However (this is the stupid bit) - what celebs? The elite women start at 9 am, and the elite men from the blue start, so can't be them. Or is it all the people who are celebrities but not necessarily great runners - TV shows and the like? I am just wondering who to watch out for...