Is this a case of a bogus FLOTUS?

First lady Melania Trump has been caught up in a nutty internet frenzy that makes the intrigue over the Russian conspiracy theories seem tame by comparison.

Bizarre speculation about a Melania body double has taken off faster than you can say “fake news” thanks to a tweet by @JoeVargas.

“This is not Melania. To think they would go this far & try & make us think its her on TV is mind-blowing. Makes me wonder what else is a lie,” wrote Vargas of BuyLegalMeds.com.

He posted a video of the alleged impostor — wearing sunglasses and an Inspector Gadget-like trench coat — standing near President Trump at the White House before they visited a Secret Service facility.

The president oddly referred to his “wife Melania, who happens to be standing right here.”

In the weird world of conspiracy theorists, Vargas’ theory quickly went viral and unleashed endless memes, GIFs and snide remarks on social media.

Newsweek noted that Google searches like “Melania Trump double” and “Fake Melania” have shot up since the video was posted.

Comedian Andrea Wagner Barton agreed that something appeared a bit off.

“Will the real Melania please stand up?” she asked her Facebook followers. “Is it me or during his speech today a decoy ‘stood in’ for Melania??”

She added: “And….Why would the moron say ‘my wife, Melania, who happens to be right here…’ Seriously, watch very closely!”

TrumpsTaxes posted: “Fake Melania Trump revealed to be elusive criminal mastermind Carmen Sandiego,” referring to the fictional cartoon villain.

Comedy writer Nick Jack Pappas alluded to actual fake news circulated by the conspiracy-minded.

“These Melania Trump body double conspiracy theories are ridiculous. Let’s focus on real stories like #PizzaGate and #SethRich,” he wrote.

Pizzagate is a debunked conspiracy theory from the 2016 presidential campaign that claimed Hillary Clinton was behind a child sex ring. Rich was a Democratic National Committee staffer killed in Washington.

A body-language expert threw cold water on the body double theories.

“Her stature and facial gestures, like her slightly pursed lips and her nodding at her husband, are consistent with what we’ve seen before,” Joe Navarro, who worked with the FBI for 25 years, told Vogue.

“Non-verbally, there’s nothing out of the ordinary about her behavior,” said Navarro, who noted the FLOTUS is very stoic by nature, which can make her more vulnerable to this kind of speculation.