"half a decade with the love of my life," Sulewski wrote on Instagram
The musician, 26, and the actress, 27, marked five years of dating on social media Friday.
"Happy anniversary to my absolute dream girl!!! Best 5 years of my life!!!," the Optimist performer wrote on Instagram alongside a video of Sulewski riding a motorcycle.
Sulewski commented on the post, "BEST FIVE OF MINE BABY."
She also made a post of her own and included a series of sweet photos together.
"half a decade with the love of my life ♥️ lucky us," she wrote.
In July, O'Connell and Sulewski walked the pink carpet at the world premiere of the Barbie movie in Los Angeles. The couple were joined by Billie Eilish, who collaborated with brother O'Connell on a song for the Barbie soundtrack titled "What Was I Made For?”
That same month, Sulewski wished O'Connell a happy birthday on Instagram.
"one year closer to fathering my children. huge. painfully in love with you. happy birthday my ," she wrote, alongside a series of photos and videos from sweet moments in their relationship.
Sulewski and O'Connell met in 2018 on a dating app, though they have not specified which one.
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.
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