No virus was about to keep Natalie Reese from her high school prom, even if she had to hold it in her living room all alone.

That’s what happened on Saturday in Danville. Actually, Natalie wasn’t exactly alone. She has more than 655,000 online followers on the video-sharing service TikTok, thanks in part to a strange fate that thrust her into the role of de facto prom queen of planet Earth.

“I’m not really the prom queen,” she said. “Everybody is the prom queen. And king. This is about everybody.”

Natalie, a junior at San Ramon Valley High School, said she had been dreaming about her prom since she was in elementary school. A few months ago, she sealed the deal by doing endless household chores to finance the purchase of a pink embroidered mesh dress, the kind Disney princesses traffic in. Then her prom, along with practically everything else in the world involving more than two people, got called off.

Natalie spent a few seconds being disappointed, then she decided to do something about it. Last week she shot a video of herself putting on her prom makeup and pink dress and then stepping into her living room to dance with her father, Bryan, the only male dance partner readily available. It got 11 million views and charmed the world more profoundly than any cat video.

So Natalie decided to keep the thing going, and she invited all her new online friends around the world to join her on Saturday in getting dolled up, made up and decked out. It was eerie to don evening finery not long after sunrise but, she said, plenty of her followers are overseas, where it was already late in the day.

More Information Online: To watch Natalie Reese’s online prom videos, go to www.tiktok.com/@nataliereesie

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She spent a solid hour curling her hair, dabbing concealer onto her chin and dousing herself with foundation, powder, eyeliner, eye shadow, lipstick, gloss, and various other potions and goops.

Then she propped her cell phone video camera on a window ledge, turned it on and dragooned her entire decked-out family — parents and two sisters and her small white dog Boo Bear — in a series of fast and slow dance steps that involved hand claps, shoulder shakes, waltzes and wiggles.

Her father was game. Natalie, he said, can talk him into anything. He is handling his newfound notoriety as best he can.

“As the parent of a 17-year-old girl soon to go off to college,” he said, “I take advantage of every opportunity to do something with her.”

“My dad is my role model,” Natalie said, a phrase that does not always pass the lips of 17-year-old girls.

In minutes, Natalie had edited a half dozen brief dance videos, punching the video screen expertly with two lacquered thumbs. Then she posted them for her followers.

The first video went up at 12:12 p.m. Within half a minute, 243 viewers had seen it. Within two minutes, more than 1,000 people had seen it and 400 of them had “liked” it. One of them was from Germany.

“This is a good idea,” the person from Germany said, after Natalie ran the comment through a translator program.

There were heart icons and thumbs-up icons and scores of people who wanted to know where to get the pink dress, all in the first five minutes. Natalie’s prom went viral faster than the virus went viral.

How great it was, Natalie said, to give the world a break and to give shut-out prom-goers a way to take part.

“This whole thing is sort of insane,” she said. “But it’s part of history. It’s what we have now. And everyone is looking for a reason to smile. I’m glad if I could give that to people.”

Steve Rubenstein is a San Francisco Chronicle staff writer. E-mail: srubenstein@sfchronicle.com Twitter: @SteveRubeSF