In the spring of 2018, indie pop singer and Tumblr influencer Grimes started dating tech billionaire and Tesla mogul Elon Musk.

Their relationship started on Twitter.

According to Page Six, Musk and Grimes’ relationship started on Twitter, as all great love stories do. They first bonded over a joke about artificial intelligence. Musk, as the story goes, wanted to post a joke to the platform, but found that the singer had beaten him to the punch. The joke was about the thought experiment, Roko’s Basilisk, which suggests that robots will one day torture those who don’t embrace AI and help speed its development.

Musk wanted to tweet a play on the theory using the word “Rococo” as a sort of pun, in reference to 18th-century baroque style. But when he searched the word on Twitter, he found that Grimes had named a character “Rococo Basilisk” in a 2015 music video for her song “Flesh Without Blood.”

“[This character] is doomed to be eternally tortured by an artificial intelligence, but she’s also kind of like Marie Antoinette,” Grimes said in an interview with Fuse of the character.

Musk, reportedly, was smitten, and knew he had to reach out.

They debuted their relationship at the Met Gala — and people were stunned.

On May 7, they debuted their relationship at the Met Gala. Shortly before the couple made their dramatic entrance on the red carpet, Musk finally made his niche joke.

And don’t worry, it came with an explainer.

Hours later, the couple made their grand entrance. While neither really dressed to the occasion’s theme of “Heavenly Bodies: Fashion and the Catholic Imagination,” the Canadian musician made a fashion statement by wearing what appeared to be a Tesla choker.

Elon Musk and Grimes at the Met Gala 2018
The theme of this year’s Met Gala was “Heavenly Bodies: Fashion and the Catholic Imagination.” Neilson Barnard/Getty Images
People were stunned, at first.

The jokes about their relationship were excellent from the start.

Shortly after they started dating, Grimes changed her name.

On May 17, Grimes, who was born Claire Boucher, took to Twitter to announce that she planned to legally change her name to c in a reference to the speed of light. OK.

In a since-deleted tweet, she said that this was Musk’s idea.

“Well he’s the one who pointed out that my working nickname (c) actually rox and I don’t need to look further (been trying 2 change name 4ever but couldn’t find a gud 1, but my friends call me c },” she wrote, per Mashable.

Also on Twitter, the singer said that has always disliked the name Claire.

Although she was quick to add that Grimes will still be her stage name.

But days later, they publicly clashed over Musk’s union policies.

On May 21, Grimes — or c if that’s your preference — wrote in a now-deleted Tweet that Musk has not prevented Tesla employees from unionizing.

“He has never prevented them from unionizing it’s quite literally fake news. trust me, I’ve investigated this heavily and even visited factories etc,” she wrote, according to BuzzFeed. “I have the receipts but since it effects [sic] others I’ll wait til I ama w imminent new music b4 I answer more queries.”

Before Grimes and Musk started dating, her Twitter bio read “anti-imperialist.” But she took the label out of her bio after she started dating the founder and CEO of SpaceX.

Grimes’ post came after series of tweets Musk wrote on May 20, in which he said employees at Tesla’s production plant haven’t unionized because “they just don’t want to.”