Tina Fey is hilarious on Saturday Night Live as Sarah Palin and all.

But we miss Liz Lemon - and can't wait until October 30 when 30 Rock returns for its third season.

To get fans excited about a batch of new, undoubtedly hilarious and absurd episodes, here's a look at who will be guest-starring on the sitcom this fall:

• Megan Mullally will appear as Liz's adoption agent on the season premiere;
• Look for Oprah on the November 6th episode;
• Jennifer Aniston guest stars as Liz's former roommate;
• Steve Martin will play Liz's next love interest, an eccentric billionaire who hasn't left his Connecticut compound in three years.

Jerry Seinfeld guest-starred on the season two premiere of 30 Rock. A host of new celebs are lined up for season three.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.