Who Is Finneas O’Connell’s Fiancée? All About Claudia Sulewski

Finneas O’Connell and Claudia Sulewski are in their engaged era!

The Grammy-winning artist rose to fame while creating music under the name FINNEAS and producing for artists like Selena Gomez, Halsey, Justin Bieber, Demi Lovato and Camila Cabello. While he had plenty of support from his sister and collaborator Billie Eilish, he also found inspiration and encouragement from Sulewski, who he began dating in 2018 after meeting on a dating app.

Since getting together, O’Connell and Sulewski have experienced some major milestones, including buying a house and adopting a dog together. Now, they’re celebrating a new chapter, as the pair announced their engagement in September 2025 — on the seventh anniversary of when they began dating.

A few months earlier, O’Connell celebrated Sulewski’s birthday with a sweet Instagram tribute, calling her the “light of my life.”

“I thank my lucky stars you were born!” he wrote. “Watching the fruits of your meticulous labor take shape over this past year has been so dreamy and inspiring- can’t wait to spend another year cheering you on.”

So, who is Finneas O’Connell’s fiancée? Here’s everything to know about Claudia Sulewski and her relationship with the musician.

She’s been running a successful YouTube channel since 2009

When she was just 13 years old, Sulewski began posting a mix of beauty tutorials and lifestyle content on her YouTube channel, originally called BeyondBeautyStar. She quickly grew a large following and changed her channel to her actual name.

In 2014, she moved from her hometown in Illinois to Los Angeles to pursue a career in the entertainment industry, as she later told ELLE. Soon after, she began hosting Teen Vogue‘s YouTube channel. Sulewski acted as Teen Vogue‘s representative at award shows, red carpet premieres and other A-list events as well.

Sulewski has continued to make YouTube videos through the years and she regularly documents her life with O’Connell on her channel. At the 2019 Revolve Awards, Sulewski’s channel was recognized as the YouTube channel of the year.

She now has over 2 million Instagram followers, 2.5 million YouTube followers and 1 million TikTok followers.

She’s an actress

After moving to L.A., Sulewski told her YouTube subscribers that she had dreams of becoming an actress. She has since made the transition to the big screen and has starred in various movies and TV shows, most notably I Love My Dad, which was released in August 2022.

In the dramedy, which marked her film debut, Sulewski plays a waitress, Becca, whose image is used by a dad to catfish his son on a dating app. The film was written and directed by James Morosini and stars Morosini, Patton Oswalt and Rachel Dratch.

Sulewski has also appeared in the Hulu series The Commute, the TV short A Christmas Carol + Zombies and Runaways.

She and O’Connell met on a dating app

Sulewski and O’Connell met in 2018 on a dating app, though they have not specified which one.

They’ve now been together for over seven years, with Finneas sharing a sweet tribute to his then-girlfriend for their fourth anniversary in September 2022.

“You’d have to scour the globe to try to find someone equally as talented, creative and hard working as you are, my love. Then you’d have to do it a second time to try to find someone as kind, thoughtful and generous. A third time to find someone as funny, a fourth to find someone as loving, a fifth to find someone as beautiful,” he wrote on Instagram.

He continued, “How you manage to be every one of these things all at once, will forever be the impossibility of you. Happy anniversary, Baby, I love the hell out of you.”

She’s the inspiration for several of O’Connell’s songs

In a 2019 interview with BuzzFeed, O’Connell told the outlet he wrote the song “Claudia” within hours of meeting her and sent her fragments of the song to listen to that night. The song lyrics begin with phrases like “I think you’re gonna change my plans / With those emerald eyes / But you don’t even understand / How much they’re on my mind.”

In 2022, he wrote and produced “Mona Lisa, Mona Lisa” with Sulewski as his muse. She starred in and directed the accompanying music video. The phone-recorded video follows the couple in Paris as they pose in front of a bathroom mirror, kiss at the Eiffel Tower and cuddle in bed together.

“It’s a gushy video, for sure!” Sulewski told Vogue. “We’re pretty deep in it at this point — we’ve been dating for almost four years, so I think the cat’s out of the bag,” O’Connell added.

She and O’Connell bought a house together in 2019

The couple bought their first house together in October 2019. Sulewski announced the news on Instagram and in a since-deleted YouTube video that documented their big moving day.

In a later interview with ELLE, Sulewski shared that their L.A. home features a recording studio for O’Connell as well as an office for herself. She added that they are constantly motivating each other when it comes to their respective careers and creative endeavors.

In the years since purchasing the home, the YouTuber has been giving her followers updates on the decoration process and tours of the space on her channel.

She and O’Connell rescued a dog together

In December 2019, the couple rescued a pitbull named Peaches from Angel City Pit Bulls in L.A. Sulewski shared the news on Instagram, posting a photo of her and O’Connell cuddled up on a couch with the pup. She wrote in the caption, “MEET OUR PITTY PEACH🐾 we adopted her from a wonderful nonprofit @angelcitypits and I vlogged the first 24 hours with her.”

Peaches frequently appears on the couple’s social media and in Sulewski’s YouTube videos, often cuddled up beside them in bed or on the couch.

She’s close with Billie Eilish, O’Connell’s sister

Sulewski appears to have a close relationship with her fiancé’s sister, Eilish. The two make frequent appearances on each other’s social media and in December 2021, Sulewski dedicated a sweet tribute to the pop star on her birthday.

“ILOVEYOUSOMUCH !!! happy birthday billie the world wouldn’t be the same without you,” she captioned a series of pool selfies taken together.

Despite their closeness, Sulewski makes a conscious effort not to show Eilish on her channel. O’Connell himself has commented that Eilish’s day-to-day life is more challenging than theirs, and he has “no desire to be any more famous than I currently am.”

She is often O’Connell’s date to major events

At the 2022 Grammy Awards, O’Connell and Sulewski appeared on the red carpet in matching silk suits from Gucci.

Two years later, at the 2024 Grammy Awards, Sulewski walked the red carpet in a skintight dress by Givenchy, and O’Connell donned a simple all-black ensemble. Later that evening, the music producer took home two Grammys.

Sulewski was also by O’Connell’s side at the July 2023 premiere of Barbie and the 2024 Vanity Fair‘s Oscars afterparty following his win for Best Original Song.

“I’M SO PROUD OF YOU, LOVE OF MINE,” the actress wrote on Instagram after the big night.

They got engaged in September 2025

After seven years of dating, O’Connell popped the question to Sulewski on Sept. 22, 2025.

They announced the news in an Instagram post on Sept. 24, sharing photos from the romantic sunset proposal, along with a video of them in a helicopter heading to the proposal site.

“forever and ever 9.22,” they captioned the post.