The show must go on, as they say.

On Tuesday evening, New York City billionaire John Catsimatidis hosted a star-studded screening of “Marty Supreme,” featuring his own cameo, at the AMC Kips Bay 15. The event, attended by numerous political figures, was aimed at celebrating the movie’s Oscar buzz.

However, shortly after the film starring Timothée Chalamet commenced, an unexpected sound issue caused a 40-minute interruption.

Rather than let the setback spoil the event, the Gristedes supermarket tycoon and former mayoral hopeful seized the opportunity.

“He managed to get 40 minutes of uninterrupted time with the governor,” a source revealed, highlighting that WABC radio station owner Catsimatidis was seated next to Governor Kathy Hochul, who remained patient throughout the technical hiccup.

A photo captured the duo enjoying popcorn together, unfazed by the delay.

Adding some political intrigue to the scene, GOP gubernatorial hopeful Bruce Blakeman also attended the screening — marking the first time he and Hochul were in the same place at the same time since he announced.

Meanwhile, Mayor Eric Adams was supposed to be on hand to declare it Catsimatidis Day in NYC — but the tech snafu scuttled the plan to make the proclamation inside the theater.

Mayor-elect Zohran Mamdani previously attended the film’s NYC premiere.

Catsimatidis, 77, has a cameo in the movie, an awards front-runner. He told The Post last summer of the role: “I actually got paid! I’m a member of SAG. And so I got a new career at my age.”

(Buzz is that he’s actually quite good in his acting debut.)

In fact, Cats has now gotten the Hollywood bug. Said a source of his cameo, “John loved it so much, he’s looking to buy a movie studio. He’s talking to people.”

But don’t expect any dark horse bids for Warner Bros. The source said the mogul wants to build studio space “out East” on Long Island. “He’s thinking about doing something,” they said, adding Cats was talking at the event to NYC’s film and TV commish. “It’s John’s next chapter.”

It was proclaimed Catsimatidis day in NYC as well as two Long Island counties.