This week's sweeps-month guest star on that sitcom you might have heard about, NBC's "30 Rock" with Tina Fey, is ... Jennifer Aniston.

This is, I believe, her first shot on TV since leaving "Friends." No, wait -- network TV. She was on cable's "Dirt," the vehicle for her old pal Courtney Cox.

Here are some clips from Thursday's episode. Funny stuff.

More after the jump ...