Oprah Winfrey and Tina Fey
09/18/2008 AT 02:30 PM EDT
will guest-star on the Nov. 6 episode of NBC's Emmy-winning sitcom 30 Rock
, the network announced Thursday.
Winfrey, 54, filmed her role last Saturday at the Silvercup Studios in Queens, N.Y., and it is being billed as one-shot appearance.
"Oprah Winfrey's presence on 30 Rock
makes this episode a television event," Teri Weinberg, executive vice president, NBC Entertainment, said in a statement. "She is a true legend in her own time, and in this comedy's tradition, it provides the perfect showcase for stars of her renowned status. We are all thrilled."
Though she didn't say whether or not the talk-show host plays herself or some other part, the 30 Rock
's creator, executive and star, Tina Fey, does add: "Oprah is very funny in the episode, and we are beyond grateful to have her. Also, I would like to announce that we are officially best friends."
– Mark Dagostino and Stephen M. Silverman