Britney Spears danced in ‘first diamond thong.’

Britney Spears celebrated her marriage to Sam Asghari by dancing the night away.

The pop star, who tied the knot on June 9, revealed via Instagram on Saturday that she wore her “first diamond thong” during the star-studded reception.

Spears, 40, let fans in on the intimate secret when she shared a video of herself dancing in a black blazer, which left little to the imagination.

“LIVING IS GIVING … pssss don’t worry I had my first diamond thong underneath my jacket … hope I didn’t offend anyone 😜😜😜 !!!,” she captioned a clip of the newlyweds busting a move during the wedding reception.

The long-sleeved, super-short tuxedo dress featured a glittering silver trim and button detail at the front.

She completed the sexy look with her tresses styled in long, loose waves.

Meanwhile, Asghari, 28, spent the ceremony in a tee emblazoned with “Britney & Sam” and black pants. He couldn’t seem to wipe the smile off his face the entire night.