If you’ve spent any time on the internet in the last seven years, you’ve probably seen the "look-alike" memes. People love to point out that Claudia Sulewski looks a bit like her boyfriend’s sister. It’s the kind of low-hanging fruit that defines celebrity discourse. But honestly? If that's the only thing you know about Billie Eilish brother girlfriend, you’re missing the actual story of one of Hollywood's most stable, creatively intertwined, and surprisingly normal couples.
Finneas O’Connell isn't just "the brother." He’s a multi-Grammy-winning powerhouse. And Claudia isn’t just "the girlfriend." She’s a pioneer of the YouTube lifestyle era who has successfully pivoted into acting and sustainable business.
Things just got a lot more official, too. After seven years of dating, Finneas and Claudia are officially engaged. The news broke in late 2025, and as we head into 2026, the couple is deep in "wedding game plan" mode.
The Sunset Proposal and That Cushion-Cut Ring
On September 22, 2025, Finneas finally popped the question. He didn't just do it at a dinner table. He took her on a helicopter ride at sunset. They landed on a scenic hilltop, and he got down on one knee.
Finneas later joked on The Tonight Show that keeping the secret "ate him alive." He told Jimmy Fallon that he realized he wasn't cut out for a life of crime because he couldn't even keep a happy secret from Claudia for a few weeks without feeling like he was going to explode.
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The ring is a massive, stunning cushion-cut diamond. It’s classic but bold. Claudia shared the news on Instagram a couple of days later with the caption "forever and ever 9.22."
Who Exactly Is Claudia Sulewski?
If you think she’s just an "influencer," you’re about a decade behind. Claudia started her YouTube channel, originally called BeyondBeautyStar, back in 2007. She was a kid in Chicago making videos in her bedroom. By 2014, she moved to LA and became the face of Teen Vogue’s YouTube channel.
She’s a legitimate entrepreneur now.
- Cyklar: In late 2023, she launched this sustainable body care brand. It’s not just a celebrity cash grab; she’s been vocal about the "meticulous labor" (Finneas's words) she put into the formulas and packaging.
- Acting: She made her big-screen debut in the 2022 film I Love My Dad.
- Directing: She’s directed several of Finneas's music videos, including the one for "Mona Lisa, Mona Lisa," which was basically a collection of their private moments in Paris.
The "Dating App" Origin Story
It sounds almost too mundane for two people this famous, but they met on a dating app in 2018. They haven't specified which one—though fans have theories—but the connection was instant.
Finneas wrote the song "Claudia" within hours of their first date. Talk about a high bar for a second date. He sent her parts of the track that same night. The lyrics like, "I think you're gonna change my plans / With those emerald eyes," turned out to be prophetic. She really did change his plans.
They moved fast in the ways that matter. By 2019, they bought a house together in Los Feliz. They adopted a pitbull named Peaches. During the pandemic, they even started a podcast called We Bought a House, though they ended it after realizing they were sharing a bit too much of their private lives with the public.
The Relationship with Billie Eilish
There’s often a weird tension when a famous sibling brings a partner into the mix. Not here. Billie Eilish brother girlfriend is a search term that often leads to photos of the two women hanging out, laughing, and supporting each other.
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When the engagement news dropped, Billie didn't just give a PR-friendly quote. She reposted the announcement with crying emojis and heart hands. She also shared a screenshot of their FaceTime call where she’s literally gasping at the ring.
Claudia has been a staple at Billie’s biggest moments, too. She was on the pink carpet for the Barbie premiere and has been at nearly every Grammy ceremony where the siblings have swept the awards. There is no "sibling vs. partner" drama here. They are a tight-knit unit.
Addressing the Look-Alike Elephant in the Room
We have to talk about it because the internet won't stop. For years, people have claimed Claudia looks like a "twin" of Billie.
Honestly, it’s mostly the eyes and the face shape. But if you look at photos of them together, the comparison falls apart pretty quickly. They have completely different styles and vibes. Finneas and Claudia have mostly ignored the comments, which is probably the healthiest way to handle being a meme.
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What’s Next: The 2026 Wedding
As of January 2026, the wedding planning is in full swing. Claudia recently told her YouTube subscribers that she and her stylist have a "game plan" for her custom bridal looks.
They’ve hired a wedding planner and are currently scouting venues. Interestingly, Finneas is apparently way more involved in the details than Claudia expected. She mentioned in a vlog that he has a lot of opinions on the aesthetic, which she loves because she wants it to feel like their day, not just a production she’s running.
Why This Relationship Works
Most Hollywood couples burn out in two years. These two have hit the seven-year mark and are just getting started. Why?
- Creative Collaboration: They don't just live together; they work together. She directs, he produces. They are each other's muses.
- Normalcy: They do normal stuff. They walk their dog. They go on road trips. They don't live for the paparazzi.
- Privacy: After the podcast ended, they pulled back. They still share glimpses on social media, but the "core" of their relationship stays off-camera.
If you’re looking for a scandal or a breakup, you’re looking in the wrong place. These two are the real deal.
What you should do next:
If you're a fan of their aesthetic, keep an eye on Claudia's YouTube channel over the next few months. She’s likely to drop more "wedding prep" vlogs that give a behind-the-scenes look at the venues and designers they’re choosing. Also, listen back to the track "Claudia" on Finneas’s Blood Harmony EP—it’s the ultimate time capsule of how this whole thing started.