It's Oooooooprah Winfrey!
The television icon is guest-starring on 30 Rock Thursday night.
And as you can tell from the clip below, Liz Lemon is almost as excited about this appearance as we are:
[video url="/videos/oprah-on-30-rock/" title="Oprah on 30 Rock"][/video]
Want more 30 Rock?
Sign up for our daily newsletter and receive the latest tv news delivered to your inbox for free!