A timeline of Elon Musk's and Grimes' relationship, from making their debut at the Met Gala to co-parenting 3 kids

• Tesla and SpaceX CEO Elon Musk and the musician Grimes started dating in 2018.

• They've since broken up and gotten back together more than once but now appear to just be co-parents.

• Here's a timeline of their relationship, including a move to Texas and the birth of three kids.

Claire Boucher, better known by her stage name, Grimes, is a Canadian singer and producer. She's also an outspoken advocate for female artists and their treatment by the press and music industry. She's released multiple albums to critical acclaim, and her breakout album, "Visions," won the Juno Award for Electronic Album of the Year.

Source: Juno Awards, Insider

Grimes and Elon Musk, the CEO of Tesla and SpaceX, met over Twitter. Musk was planning to make a joke about artificial intelligence and discovered she had beaten him to the punch via the Rococo Basilisk character from her "Flesh Without Blood" music video.

Source: Twitter

In May 2018, shortly before the annual Costume Institute Gala at the Metropolitan Museum of Art, Page Six reported that the pair had been "quietly dating" for a few weeks. The report announced that the couple planned to attend the Met Gala together, and that they had been tweeting at each other for a few months.

Source: Page Six

Grimes and Musk did end up attending the Met Gala together, which was their first official appearance as a couple. Musk later told The Wall Street Journal that he loves Grimes for her "wild fae artistic creativity and hyper intense work ethic."

Source: The Wall Street Journal

News of their relationship spurred an outpouring of memes by their legions of loyal fans online, who were caught by surprise by the unexpected pairing. Someone even made a Google Chrome extension that replaced all instances of "Elon Musk" on a webpage with "Grimes' Boyfriend."

Source: Vice, The Verge

Early on in their relationship, Grimes took to Twitter several times to defend Musk and Tesla. In since-deleted tweets, Grimes said Musk has never tried to stop Tesla workers from unionizing and claimed she encouraged a union vote among Tesla employees.

Source: Insider

Grimes also began attending official events with Musk, like the Hyperloop Pod Competition in July 2018. She and Musk, along with his five sons, made an unscheduled appearance at the event.

Source: Insider

That same month, after it was revealed that Musk had made donations to Republican political committees, Grimes defended his choice, calling it "the price of doing business." After her tweets began to receive some backlash, she added that "there is no world in which i'm ok w republican donations.."

Source: Jezebel

That August, Musk sent this now infamous tweet: "Am considering taking Tesla private at $420. Funding secured." He later admitted he picked the $420 share price as a joke to amuse Grimes, according to the SEC.

Source: Insider

Musk and Tesla eventually settled with the SEC over the tweet, agreeing to pay $20 million apiece. Musk also agreed to step down as chairman of Tesla's board and appoint a committee to oversee his communications.

Source: Insider

Rapper Azealia Banks claimed to be at Musk's house in Los Angeles during that weekend while he was "scrounging for investors" following his tweet. She compared the situation to something out of the movie "Get Out."

Source: Insider

Later that summer, Musk and Grimes unfollowed each other on Instagram, and Musk unfollowed Grimes on Twitter, which caused some to speculate that their relationship was on the rocks.

Source: Insider

But by October, it appeared that they had reconnected: they were spotted at a pumpkin patch in Los Angeles with Musk's five sons. Musk also re-followed Grimes on Twitter.

Source: Insider

A few months later, in January 2019, Grimes tweeted that she was "randomly" in China at the same time as Musk was opening Tesla's new factory in Shanghai. The two were filmed eating a meal together in Beijing.

Source: Insider, Daily Mail

Grimes described Musk as "a super-interesting goddamn person" in a Wall Street Journal profile that March.

Source: The Wall Street Journal

In November 2019, Grimes may have made an appearance at the unveiling of Tesla's highly anticipated Cybertruck: the "cybergirl" hologram who unveiled the truck sported a seemingly identical leg tattoo as the one Grimes has. Many speculated the hologram was actually Grimes, although it was never confirmed.

Source: Insider

A few weeks later, the couple was spotted cruising around Los Angeles in the Cybertruck, stopping to grab dinner at high-end Japanese restaurant Nobu.

Source: The Cut

When Grimes performed at the 2019 Game Awards in December, Musk was in the audience, even giving her a standing ovation.

Source: Insider

The couple stopped by the annual Kardashian-Jenner family Christmas Eve party that December, posing for a photo with Kim Kardashian, Kanye West, and rappers Travis Scott, Quavo, and Saweetie.