David Letterman Calls Jay Leno 'Most Insecure Person' Ever (Video)

While famous David Letterman fans such as Howard Stern and Jimmy Kimmel publicly air their hatred for Jay Leno, the CBS late-night legend takes a softer approach in his upcoming interview with Oprah Winfrey.

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"Jay and I were friends -- we were always friends, before all of this happened," he says, addressing the feud in a teaser from his Oprah's Next Chapter sit-down airing Jan. 6.

"I've never met anyone quite like Jay. And I will say, and I'm happy to say, I think he's the funniest guy I've ever known," Letterman adds. "Just flat out. If you go and see him do his nightclub act -- just the funniest, the smartest, wonderful observationist and very appealing as a comic. Therefore, the fact that he is maybe the most insecure person I have ever known -- I could never reconcile that."

In the episode, Letterman also addresses his struggle with depression and the 2009 scandal that revealed his Late Show affairs.

Watch his Leno remarks below.