The Sphere, the Las Vegas-based orb that Madison Square Garden boss James Dolan spent $2.3 billion to build, is now the world’s highest-grossing entertainment venue — defying initial doomsday predictions from naysayers.

Last year alone, some 1.7 million people bought a ticket to a show at the site, generating $379 million for the venue, according to trade publication Pollstar.

That blockbuster performance helped push Sphere Entertainment into the black, reporting a net profit after posting steep losses the year prior.

Investors have taken notice. The company’s stock has surged dramatically over the past year, climbing from around $26 to $137.29 at its peak.

The Pollstar figures were first cited by the Wall Street Journal.

Dolan is now looking to build on his success, with plans to bring another Sphere to Abu Dhabi and a smaller, 6,000-seat venue in Maryland, just outside Washington, DC.

The Las Vegas site has quickly turned into a must-play stop for major acts, with blockbuster residencies from U2, the Eagles, Phish and the Backstreet Boys drawing packed crowds. Meanwhile, an immersive screening of “The Wizard of Oz” has pulled in millions in ticket sales.

Entertainment journalist Brian Balthazar said the venue’s success reflects shifting audience expectations — with fans now seeking immersive outings rather than traditional screenings.

“The success of the Sphere is a great example of how consumers have raised their expectations for what is worth going out and seeing, and when venues create a unique opportunity, it pays off,” Balthazar told The Post.

“Folks don’t simply want to go see a movie; they want an experience.”

The $2.3 billion venue features a 160,000-square-foot wraparound LED screen, a massive exterior display and an advanced audio system with tens of thousands of speakers.

With upcoming runs from No Doubt, Metallica and Carín León, the Sphere is doubling down on a formula that pairs nostalgia-driven headliners with high-tech spectacle.

“This variety of performances is a large part of its success — they set the goal of having something for everyone, and they are delivering on that promise,” Balthazar told The Post.

Metallica will begin its Sphere residency in October — kicking off the first of 24 shows. All of the band’s concerts at the Sphere are already sold out.

“We’re still scratching the surface,” Josephine Vaccarello, executive vice president of live for Sphere Entertainment and MSG Entertainment, told the Journal.

“Every act that comes in there — and I love this — everyone tries to one-up the last act.”

The eye-popping success marks a sharp reversal for a project that initially bled red ink.

Sphere Entertainment posted a net loss of $325 million in 2024 as the company grappled with the massive costs of launching the high-tech venue.

That picture improved markedly in 2025, when the company reported net income of $33.4 million as ticket sales surged and more shows filled up the calendar.

Ticket prices for Sphere shows routinely run into the hundreds — and in some cases, the thousands.

On the resale market, tickets are averaging $521 this year on SeatGeek, up from $415 a year ago. Phish commands some of the steepest prices at around $798, followed by U2 at $754 and the Eagles at $639.