Director Jon Favreau fought to keep the improvised bit in the film.

While working there, Buddy meets a grizzled man credited only as “Mailroom Guy.”

But the role was originally intended as a one-line part.

Mark Acheson played the role of a mailroom worker who ends up befriending Ferrell’s character Buddy Hobbs

Credit:New Line Cinema

Would you like to do it?"

Mark Acheson, who plays Mailroom Guy,told PEOPLE.

“And I said, yeah, I’d be happy to do that.

I was only supposed to say work release, and that was the end of it.”

Instead, the job turned into what Acheson called " “the weirdest day I could possibly imagine.”

But there’s one line that has recently taken the internet by storm.

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Acheson’s character tells Buddy he’s 26 years old and has “nothing to show for it.”

Buddy replies, “You’re young, you’re so young.”

The joke is, of course, that Acheson, who is now 67, is clearly not 26.

“The producers wanted to axe the whole scene because of that,” Acheson revealed.

“I think, Who is gonna believe this guy is 26?

I mean, seriously.

I believe I was 46 at the time and an older 46 even at that.

Because I never looked young in my life.”

But Favreau pushed back against cutting it.

“Jon Favreau fought for it,” Acheson added.

“He said, ‘That’s the joke, that’s the funny part, right?'”

The line continues to delight fans, with the joke becoming something of a meme this year in particular.

But no way in hell do I believe the guy on the left is 26.

One of the biggest lies in movie history."