Jon Stewart noticed a Donald Trump look-alike near the actual president on the Joint Base Andrews tarmac ― and the “Daily Show” host dubbed him “backup Trump.” (Watch the video below.)

On Monday’s episode, the comedian had mocked the president’s comments about the just-finished World Cup when he got distracted.

“What’s up with the guy behind Trump? Can we see that again? Can you bring that out?” Stewart said.

Video and still shots showed a man whose gait and silhouette ― especially from behind ― looked somewhat like the president.

“Who the fuck is this guy?” Stewart said. “Who in the world is it? Oh, my God! Is that a backup Trump?”

“Who? What?” the gobsmacked host said, adding a mind-blown gesture for good measure.

Then Stewart hilariously delved into shadowy territory.

“Is that a backup Trump or is that Trump?” he said. “Wait, is the one we’ve been dealing with backup Trump or is that Trump?”

Stewart moved on but conspiracy theorists might wanna chill on this one.

Here he is looking kinda like Donald Trump as he followed his daughter into Air Force One back in March:

Viktor Knavs, Melania Trump’s father, follows her onto Air Force One in March.

BRENDAN SMIALOWSKI via Getty Images

The New York Post reported that Trump’s 82-year-old father-in-law would make an “imperfect body-double” because he’s much shorter.

He’s also not exactly a dead ringer, as this photo from a recent FIFA reception at Trump Tower shows.

Knavs at a FIFA reception at Trump Tower in New York.

Andrew Harnik via Getty Images