Knock, knock. Who exists? Elon Musk.

And the normally chucklesome cast of “Saturday Night Live” is not chuckling.

Giggles turned to groans for some members of the “SNL” ensemble Saturday when NBC announced that Musk, 49, will helm their sketch comedy show as host together with musical guest Miley Cyrus on May 8.

The contentious Tesla CEO will be the very first nonactor or nonathlete to host “Saturday Night Live” since Donald Trump led the satirical sketches in 2015.

Musk tauntingly confirmed his approaching emcee gig, tweeting: “Let’s learn simply how live ‘Saturday Night Live’ really is.”

The polarizing tech magnate– boasting a net worth of around $179 billion– punctuated his puzzling post with the grinning devil emoji to let his 52 million Twitter followers understand he indicates company.

But “Saturday Night Live” quipster Bowen Yang seemed to have hoped that Musk’s social-media memo was absolutely nothing more than a bad joke.

“What the f—- k does this even mean,” Yang, 30, questioned in an Instagram Story post connected to a screenshot of the SpaceX leader’s tweet.

Fellow “SNL” jokester Aidy Bryant echoed Yang’s issues about Musk– the third-richest individual on the planet, according to Forbes’ real-time billionaire signboard– and his forthcoming term as master of ceremonies.

Bryant, 33, reposted a tweet from Sen. Bernie Sanders as a thinly veiled dart focused on Musk that read: “The 50 wealthiest people in America today own more wealth than the bottom half of our individuals.”

“Let me duplicate that, due to the fact that it is nearly too absurd to think: the 50 most affluent people in this nation own more wealth than some 165 MILLION Americans. That is an ethical obscenity,” the cyber barb continued.

An upcoming” Saturday Night Live”hosting gig by Elon Musk(center)is causing outrage amongst “SNL “stars Bowen Yang(left), Aidy Bryant(best)and Andrew Dismukes.Getty Images “Saturday Night Live” writer-turned-trouper Andrew Dismukes, 25, joined the jibing, saying on Instagram,” Just CEO I wan na do sketch with is Cher-E Oteri”– a recommendation to the previous “SNL” veteran.

Yang, Bryant and Dismukes’ social-media shafts have actually because been deleted.