"I like to think of you and me as more real guys, as opposed to you and Jay," Letterman said, adding his Leno impression.
"And now you're sounding like him," Williams replied.
Despite Letterman's ribbing of Leno about his plethora of cars, Williams played along well while still managing to remain neutral. Williams even tried to change the topic to Regis Philbin, but Letterman managed to quickly turn the conversation back to Leno.
"I'd really rather [Regis] spend more time with Jay," Letterman joked.