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Leno's Last Night Set

Starting next June Conan O'Brien will take over "Tonight" hosting duties for Jay Leno; Leno's fate remains unknown.

Leno's last show will be Friday, May 29, and O'Brien will start on Monday, June 1, NBC executives said.

NBC is trying to keep Leno with the network, but the soon to be deposed host has indicated he is ready to jump ship. NBC competitors, including other major networks, may be the ones throwing Leno the life preserver.

Jimmy Fallon will be taking over "Late Night" for O'Brien in March or April of 2009.

O'Brien will wrap up filming of his show sometime in the first quarter of the year - the exact date has yet to be determined. The network will air reruns until Fallon takes over.