You're definitely missing something. Georgina is a girl from Serena's past. She's played by Michelle Trachtenberg.

actually, you're not "missing" anything. Georgina is a new character that has yet to be introduced on the show. i haven't read the books, but i'm assuming that some people already know about her because she's in them?

people really should be less cavalier about spoilers. sigh.

I think it is georgie as well.