09/02/2008 AT 8:45 PM ET
As Claire Harper, Aniston will be Tina Fey’s former roommate who shows up in New York and attaches herself to Alec Baldwin.
“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 Fey, who is the creator, executive producer and star of 30 Rock, which returns on Oct. 30.
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