Jennifer Aniston will be portraying a stalker in a guest stint on NBC's 30 Rock and here are some pictures to prove it. Just Jared has posted some new images of Aniston filming her guest spot on the NBC comedy. Click on the images below to access our gallery.

Aniston's character, Claire Harper, is a former roommate of Tina Fey's Liz Lemon, who starts to stalk Alec Baldwin's Jack Donaghy.

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30 Rock premieres on Thursday, October 30 on NBC.