Everyone wants to know who the biggest YouTuber on the planet is dating. It makes sense. Jimmy Donaldson, better known as MrBeast, spends his days giving away millions of dollars, building chocolate factories, and burying himself alive for views. But behind the scenes of the chaotic stunts and massive Philanthropy, there’s a much more grounded story unfolding. If you’ve been scouring the internet to figure out who is MrBeast's fiancee, you’ve likely seen the name Thea Booysen pop up everywhere.
They aren’t technically married yet. They aren't even officially "engaged" in the sense of a public diamond ring announcement, though the rumors fly constantly. Thea is way more than just a "YouTube girlfriend," though. She’s a published author, a neuroscientist, and a legitimate gaming personality in her own right.
The South Africa Connection
The story of how they met sounds like something out of a weirdly specific rom-com. It wasn't at a flashy LA party. In 2022, Jimmy was actually in South Africa. He was taking a break, or at least as much of a break as a guy with 300 million subscribers can take. He was hanging out with some other creators when he met Thea.
Honestly, she didn't really know the scale of his fame at first. Imagine meeting a guy who says he makes YouTube videos, only to find out he basically runs a digital empire. Thea has talked about this on various podcasts, mentioning how she was struck by how much he talks about work. Jimmy is obsessive. We know this. But for Thea, who is deep into the world of academia and professional gaming, that level of drive actually clicked.
She isn't just a bystander in his world. Thea Booysen, known online as TheaBeasty, has a massive following on Twitch. She’s particularly famous in the Gwent community—that’s the card game from The Witcher series. It’s not exactly the "mainstream" FPS crowd, which tells you a lot about her. She likes strategy. She likes complexity.
More Than Just a Social Media Personality
Most people trying to find out who is MrBeast's fiancee expect a typical influencer. Thea breaks that mold. She has a degree in psychology and another in honors neurobiology. She’s literally a brain expert. While Jimmy is figuring out how to make a car jump over a house, Thea is often busy with her own intellectual pursuits.
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She’s also a published novelist. Her book, The Marked Children, is a YA sci-fi/fantasy story that she worked on long before she became a household name in the MrBeast fandom. It’s actually pretty impressive when you look at the timeline. She didn't use Jimmy's fame to get a book deal; she already had the drive.
- She’s South African.
- She’s a Twitch streamer with a focus on strategy games.
- She holds multiple degrees in the sciences.
- She’s an author of speculative fiction.
This mix of "nerdy" interests and high-level education seems to be the glue for them. Jimmy has often said in interviews, like his long-form chat with Lex Fridman, that he needs someone who can keep up with his brain. It moves fast. If you’ve watched his content, you know he’s perpetually "on." Thea seems to be one of the few people who can actually match that frequency without getting overwhelmed by the sheer scale of the MrBeast brand.
Are They Actually Engaged?
The internet loves a wedding. Every time Thea posts a photo on Instagram where a ring finger is even slightly obscured, the comments section explodes. As of early 2026, they haven't held a massive, public engagement ceremony. Jimmy is a guy who does everything for the camera, but he’s surprisingly private about his actual heart.
He’s been burnt by the spotlight before. His previous relationship with Maddy Spidell was very public, and when that ended, the internet was... well, the internet. It was messy. With Thea, things feel more mature. They travel together, she appears in the background of videos, and she’s often seen at Beast Philanthropy events, but they aren't selling their relationship as a content product. That's a huge distinction.
Some fans point to "Thea Donaldson" jokes or the way Jimmy's inner circle treats her as proof that the "fiancee" title is already accurate behind closed doors. Whether there's a legal document or a massive rock on her finger doesn't really change the fact that she's his partner in every sense of the word.
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Dealing With the "MrBeast Effect"
Being linked to the biggest creator on Earth isn't all private jets and Feastables. Thea has dealt with a fair share of toxicity. When she first started appearing in videos, the "gold digger" comments were inevitable. It’s the standard, lazy internet trope.
But it didn't stick. Why? Because she’s clearly self-made. When you have a masters-level understanding of neuroscience and a successful streaming career, the "gold digger" narrative falls apart pretty fast. She’s also been a massive support system for him during some of his more controversial moments. Over the last year, as MrBeast has faced scrutiny over everything from set safety to the ethics of his giveaways, Thea has been a constant, quiet presence.
She doesn't usually get in the mud and fight on X (formerly Twitter). She just stays the course. That kind of stability is probably worth more to Jimmy than a hundred million views.
Why Thea Booysen is Different
In the world of celebrity YouTubers, relationships often feel like "collabs." You see it all the time. Two big creators date, they film twenty videos together, they start a joint channel, and then they break up and delete the playlist.
Thea and Jimmy don't do that.
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Sure, she’s in the videos sometimes. She was in the "100 Days in a Bunker" type content and some of the travel vlogs. But she isn't the content. Her own YouTube channel is vastly different. She talks about books. She talks about psychological concepts. She plays card games. She has maintained an identity that exists entirely outside of the "MrBeast" bubble.
The Future of the Power Couple
What’s next? Probably more of the same, just bigger. As Jimmy expands his empire into traditional TV with Amazon Prime and grows the Feastables brand into a global snack competitor, he’s going to need that "anchor" more than ever.
If you're looking for a definitive answer on the "fiancee" status, keep an eye on their South Africa trips. That's where they seem most relaxed. It's where the cameras aren't always rolling. While the world waits for a "I Proposed To My Fiancee For $10,000,000" video (which, let's be real, Jimmy might actually do), the reality is much more low-key.
Thea Booysen is an intellectual powerhouse who happens to be dating a guy who likes to blow things up for charity. It’s a weird pairing on paper, but in practice, it seems to be the most stable thing in Jimmy’s very unstable, high-velocity life.
Next Steps for Fans and Researchers
To truly understand the dynamic between these two, you shouldn't just watch the main MrBeast channel. The real insight into who Thea Booysen is—and why she's the one Jimmy chose—comes from her own work.
- Check out her Twitch streams: Look for her Gwent gameplay. It shows her analytical side and how she interacts with a community without the "Beast" shadow.
- Read The Marked Children: If you want to know how her mind works, her fiction is the best window. It’s available on major platforms and gives you a sense of her creativity.
- Watch the Lex Fridman Podcast: Specifically the episode featuring Jimmy. He doesn't name her constantly, but he talks extensively about the type of partner he needs to survive his career. It perfectly describes Thea.
- Follow her "TheaBeasty" socials: She often shares behind-the-scenes glimpses of their travels that are much more "human" than the hyper-edited main channel videos.
Understanding Thea is the key to understanding the man behind the brand. She isn't just a partner; she's a peer.