07/24/2012 07:43 am ET Updated Jul 24, 2012

Will Ferrell Shows Off $5 Million Check Zach Galifianakis Gave Him On 'Late Show' (VIDEO)

Will Ferrell and Zach Galifianakis are guaranteed to bring laughs to their new film "The Campaign," which hits theaters nationwide on August 10. And the two funny-men are known for being hilarious on pretty much all of their guest appearances too. Even though Will Ferrell was alone promoting the film on "Late Show" (Weeknights, 11:35 p.m. ET on CBS), Galifianakis was with him in spirit.

And in the form of a rather unique birthday present. What's the appropriate gift to give someone when they turn 45, as Ferrell did this past July 16? Galifianakis kept it simple and just gave him a check.

Of course, it was for $5 million. Ferrell said he had no idea Galifianakis was worth so much, but then mentioned that he was advised to "wait to cash it."

"There might be a hold on it," Ferrell explained.

Will Ferrell and Zach Galifianakis square off in "The Campaign," coming August 10 to theaters. "Late Show with David Letterman" airs weeknights at 11:35 p.m. ET on CBS.

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