Britney Spears and Boyfriend Sam Asghari Are All Smiles While Cheering on His Sister in Her Runway Debut

The cute couple sat in the front row at the an L.A. Fashion Week event to support his big sister's 'first show.'

Britney Spears and Sam Asghari
are growing closer all the time.

On Thursday, the pop icon and her boyfriend were all smiles as they came out to support Asghari's sister, Fay Asghari, at Los Angeles Fashion Week, where she walked the runway.

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Spears, who looked stunning a skin-tight black minidress, and her dancer beau, who rocked a navy blue button-down shirt and white jeans, sat side-by-side in the front row at designer Michael Costello's Art Hearts show at the Beverly Hilton hotel.

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Asghari couldn't have been more thrilled to bring Spears to his sister's big night, and documented her runway debut on Instagram.

"My little big sister doing her first show," Ashghari excitedly captioned the video.

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Later, Costello took to Instagram to thank the cute couple for coming out and sitting in the front row at his runway show.

"You guys are such sweethearts," the fashion designer captioned a photo of the pair. "We love that you came out to support our show."

Earlier this month, Spears celebrated Asghari's 23rd birthday with a super cute snapshot from their hike in the Los Angeles hills, which she captioned, "My baby's birthday."

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Spears met Asghari when he starred in her "Slumber Party" music video, first sparking romance rumors last November. Since then, the pair have spent a lot of time hanging out and showing up on each other's social media. Check out the video below for more on their burgeoning romance.