Madonna arrives at court for jury duty.Steven Hirsch

The Material Girl ​finally ​showed up ​ for jury duty Monday morning — ​almost 30 minutes after her ​already pushed-back reporting time.

​Wearing a black suit, black sunglasses and platform sandals, ​ Madonna was whisked up the front steps at 60 Centre St. by two court officers, three policemen, two bodyguards and an assistant.

Madonna waited a few minutes to get through security and, after setting off the magnetometers twice, showed off heavy metal chains around her neck.

A female officer scanned the star’s chest with a handheld detector and waved her through.

Instead of heading upstairs with the hordes of ​regular Joes doing their civic duty, ​the “Vogue” singer was taken to a private office to meet with a head clerk.

There Madonna had a moment of shock when County Clerk Norman Goodman ​joked that he might have to sequester her for a week, sources said.

​The 55-year-old pop star is expected to be released from service after the brief appearance, another court source added.

One attorney told The Post she wouldn’t want Madge on her jury anyway.

“She’d be a total distraction,” the attorney said.

“I’m sure she’s bright, but her celebrity overrides her intellect. Everyone would be staring at her — I know I would.”

The red carpet treatment had fellow jurors in a huff.

“That’s pretty outrageous!” said professor Marianne Pita, 57, who had waited 10 minutes to get through security at Manhattan Supreme Court.

“It’s a painfully long day and it doesn’t seem quite right. Everyone should have to wait in the same line,” Pita said.

The “Holiday” singer was finally expected to show up for her civic duty after postponing her appearance twice — first after the Memorial Day weekend when she used an 11th-hour doctor’s note, and then again on June 30.

The note was handed over to court officials a day after ​Madonna tweeted about riding her horse and playing on the beach over the holiday weekend.

Another juror agreed that the special accommodations were unfair.

“The whole idea is everyone is here to serve,” said Anna, 33.

“It’s ridiculous to make it a tiered system,” she said.

But at least one juror took the news in stride.

“She’s a celebrity. It is what it is until we make it right?” joked a well-coiffed Andrew Kanakis, 33, who works in the fashion industry.

Madonna Louise Ciccone, 55, lives on the Upper East Side in a $32 million gated townhouse and also has a 24-acre horse farm in the Hamptons.

Her rep did not immediately comment. ​

A court spokesman explained that allowing Madonna to arrive an hour after hundreds of people reported for duty would cut down on distraction and still allow her to serve.

“We’re happy she’s coming,” David Bookstaver said.