Letterman lands Oprah -- at last

Oprah Winfrey has finally agreed to appear on David Letterman’s CBS late-night show, on Dec. 1.

This is sure to bring an enormous audience to Letterman, who has been falling further behind Jay Leno’s show on NBC, despite better ratings for CBS at 10 p.m. this season.

The queen of daytime appeared on Letterman’s NBC show twice (he moved to CBS in 1993) but has refused to do so again because, she has said, she did not like being the butt of his jokes.

But Dec. 1 is opening night for Oprah Winfrey Presents “The Color Purple” on Broadway -- right across the street from Letterman’s studio. (Too bad for him it falls one night outside the November ratings sweeps.)

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FINALLY

Renewals: NBC has ordered a third season of its weight-loss reality series, “The Biggest Loser.” And CBS has picked up its freshman drama “Close to Home” for the full season.

Payday: The London Sunday Times reports that Daniel Radcliffe has signed a deal worth at least $14 million to star in “Harry Potter and the Order of the Phoenix.”

Auction: A collection of poems written by Bob Dylan when he was a student at the University of Minnesota in 1960 sold for $78,000 this week in an auction at Christie’s.