After rumours that they were dating, Grimes and Elon Musk made their debut as a couple at the Met Gala.
Billionaire entrepreneur Musk and musician Grimes are said to have met online, over a joke.
According to Page Six, Musk had planned to tweet a joke about artificial intelligence but discovered Grimes had already made it.
SpaceX and Tesla founder Musk was previously rumoured to be dating actress Amber Heard.
The new couple wore black and white for the Met Gala, in New York, with its “Catholic Imagination” theme – while Grimes donned what looked like a choker in the shape of the Tesla symbol.
In March, Musk wrote that Grimes’s video for Venus Fly, featuring Janelle Monae, was the “best music video art I’ve seen in a while”.
Grimes, real name Claire Boucher, made a name for herself with her third album, Visions, in 2012.
The Canadian’s fourth album, Art Angels, also received critical acclaim.