Bill Gates’ daughter Phoebe is hard launching her new romance with a former fling.

The Phia founder, 23, went Instagram official with her high school sweetheart, Chaz Flynn, on Monday, months after she revealed her breakup from Paul McCartney’s grandson, Arthur Donald.

In the adorable photo, she held her beau as he posed with a smile for the camera. In his hand, he held a martini.

The couple looked especially dapper as they both dressed in formal wear for an unspecified occasion.

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Phoebe Gates hard launched her new relationship with a former fling via Instagram on Monday.GC Images

The Phia founder revealed she struck up a new romance with her high school sweetheart, Chaz Flynn.

She captioned the post with a simple red heart emoji.

The young tech CEO confirmed to People on Tuesday that she’s been acquainted with Flynn since they were 15 years old and first dated while attending high school in Seattle.

A rep for Phoebe did not immediately respond to Page Six’s request for comment.

In September, Phoebe vaguely opened up about her budding relationship with Flynn in an episode of her and Sophia Kianni’s “The Burnouts” podcast.

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The pair met when they were 15 and first dated while attending high school in Seattle.Getty Images for Business of Fashion

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Phoebe previously teased her new relationship on her “The Burnouts” podcast in September.GC Images

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At the time, she raved that her new man wasn’t on social media, calling it the “best thing ever.”GC Images

At the time, she dished that her beau’s lack of social media was “amazing” and the “best thing ever.”

“And this is completely new for me. I’ve never been with someone like this,” she added.

She also told her listeners that she was able to bond with Flynn by sharing the videos she makes for her brand.

“I’m like, ‘Okay, well, sit on down, bud. Let me show you the new video that we just dropped on the Phia account because I put my left titty into producing this thing, okay? So, you’re going to sit here, and you’re going to watch it.’ And he’s like, ‘Okay,’ ” Phoebe said.

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Gates was previously linked to Paul McCartney’s grandson, Arthur Donald.Variety via Getty Images

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The exes were first linked in October 2023 when Gates shared a photo of the pair to Instagram.Getty Images for Global Citizen

Phoebe was previously linked to Donald, whom she started dating in 2023. The couple was famously private about their relationship.

However, Phoebe announced their romance via Instagram in October of that year.

She later confirmed their relationship status the following summer after she graduated from Stanford University.