NEW YORK -- With Jimmy Fallon doing so well as "Tonight" show host, NBC's boss expresses no fear about who will replace David Letterman on CBS.
NBC CEO Steve Burke said Monday he doesn't believe Tina Fey or Jay Leno will be in the running to replace Letterman.
He said Fey seems happy making movies and has a production deal to make shows for NBC. NBC is still talking with Leno about a deal to make specials.
Letterman announced last week that he's retiring sometime next year.
Burke said Fallon's ratings since replacing Leno in February have surpassed NBC's expectations. No matter who replaces Letterman, Burke said he believes Fallon will still be the best in late-night TV.