Hollywood A-lister Brad Pitt is a solid eight in the eyes of Stephen Colbert. The two thoughtfully deliberated on the meaning of life while lying on a blanket under a clear night sky, as part of the recurring "Big Questions with Even Bigger Stars," sketch in Colbert's "Late Show."

Colbert's compliment came after some thoughtful (and hilarious) exchanges between the two that The Daily Mail said touched on "existential conundrums," and more on silly questions, which of course earned silly answers and burst of laughter from the Late Show studio audience.

Lying beside Colbert, Pitt asked, "Do you think mathematics are the underlying structure of the universe, or did we just invent it? The late-night host did not pretend to know the answer. Instead he affirmed the actor's drop-dead look by awarding the latter with a relatively high-number rating.

Colbert, however, seemed firmly decided Pitt is not deserving of a 10.

"Brad, I'm not sure if numbers are the underlying reality ... But one thing is absolutely true: You're a solid eight," the host declared. Holding back a chuckle, Pitt replied, "You're sweet, thanks, thanks."

Colbert further mused on the topic of beauty and wondered it good appearance is "only skin deep." Pitt's reply: "I don't know ... I've never taken my skin off."

The two likewise discussed the vastness and the mystery of the universe, and Pitt posed the question: "If the universe includes all of existence, what existed before the universe? The poker-faced Colbert proposed there has to be some form of a preview of things that went before.

"Probably just a teaser trailer for the universe, with one really good scene that isn't even in the universe once it's released," Colbert said.

Pitt and Colbert drew more laughter as they exchanged pet names, among them Bradley Trooper, Pitty-Pat, Brad to the bone, and Bradimir Pittin.

And as expected, the show host injected a pinch of politics into the discussion, telling Pitt that the vast heavens is but "an endless void no answers, no meaning, no way to construct anything from the swirling chaos." Addressing Pitt's puzzled look, Colbert dropped hint he was referring to Sean Spicer, the press secretary to U.S. President Donald Trump.

Pitt also proved that he's game for everything and prepared to make fun of things about him, his filmography, for instance. When asked if infinity can be described, the actor offered the closest explanation he could muster: "It's one less than the number of Oceans sequels we'll be making."

When confronted with the suggestion that one will not truly know the inner self, Pitt said it's unnecessary. "In the end, turns out we were all Edward Norton the whole time," the Fight Club actor reasoned.

And will he assassinate Adolf Hitler if given the chance to go back in time? No need, Pitt said, adding that already happened in Quentin Tarantino's "Inglourious Basterds."

Pitt's surprised appearance on the Late Show with Stephen Colbert is in support of the promotional campaign for his latest starrer "War Machine," which Global News said will premiere on Netflix May 26.