Exclusive! Oprah Winfrey to Guest on 30 Rock as Tina Fey's Best Friend?

Dreams really do come true, and don't let anyone tell you differently!

Just two weeks ago, while discussing some dream casting options for her NBC comedy 30 Rock, Tina Fey told reporters, "I still want Oprah to play my best friend...and I don't know what I need to do to make that happen."