Barbara Walters, Paul Rudd make out on 'Good Morning America'

"Good Morning America" had a number of great segments planned for Wednesday (Dec. 18), but it turns out that the best moment from the morning show was unscripted. As viewers and the show's producers learned, it's hard for Paul Rudd and Barbara Walters to keep their hands off one another.

Walters was on the show to promote "Barbara Walters Presents the 10 Most Fascinating People of 2013" while Rudd was there to talk about "Anchorman: The Legend Continues." When the camera cut to show the two sitting at a table together, they then proceeded to pretend to kiss one another. Or who knows, maybe there was a little tongue in there. Walters was a bit flustered, and she even thanked him at the end.

"I don't know what came over me," Rudd later tells George Stephanopoulos. "She's Barbara Walters."

Now, on repeat:

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Woo!

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Photo/Video credit: ABC