First Ross is on 30 Rock and Now Rachel

Emmy Award winner Jennifer Aniston, ("The Break-Up," NBC's "Friends") will guest-star in one episode of NBC's critically acclaimed, Emmy Award-winning comedy "30 Rock" as the free-spirited, "Fatal Attraction"-like stalker Claire Harper, Liz Lemon's (Tina Fey) former roommate from Chicago who randomly shows up in New York and attaches herself to Jack Donaghy (Alec Baldwin). The announcement was made by Teri Weinberg, Executive Vice President, NBC Entertainment.

"What a thrill to have Jennifer back on NBC on a Thursday night. She is the perfect comedic talent to work with the Emmy-winning '30 Rock' cast," said Weinberg. "This promises to be a memorable, hilarious night of comedy."

"Jennifer is not only incredibly lovely to have around, she also has what the young people would call 'mad skills.' We're very excited that she's joining us," said Tina Fey, creator, executive producer and star of "30 Rock."