The One Where Jen Recruits New Friends

Monica, Rachel, Phoebe -- is that you?

Former "Friends" star Jennifer Aniston is guest starring on an episode of "30 Rock" this season and we may have stumbled upon the hush-hush plot of the show.

Check out our footage of her on set yesterday -- don't Tina Fey and Jane Krakowski look exactly like Jen's ex co-stars Courteney Cox-Arquette and Lisa Kudrow?