Billie Eilish’s brother Finneas reveals heartfelt wedding details following engagement

Billie Eilish’s older brother, Finneas O'Connell, has recently shared exciting details about his wedding plans with fiancée Claudia Sulewski.

While attending the premiere of the highly anticipated Nobody Wanted This at The Egyptian Theatre in Los Angeles on Thursday, October 16, the 28-year-old musician gave insights into his personal life and future endeavours.

In a candid conversation with PEOPLE, Finneas reminisced the moment he knelt down to propose to Claudia.

"I was nervous and I was not, on the day it was going well and I felt really happy, but just leading up to it, there were so many elements I wanted to get right, " he said.

The Let’s Fall in Love for the Night crooner added, "And so there were a couple months where I was just lying awake at night. So that was a real sigh of relief when that all worked out."

Elsewhere in the chat, he also shared that he is letting his fiancée take the lead in planning their wedding.

“I will be a hype man. If she gives me multiple choices, I will give her my preference. But I want her to love everything about it, and I am very easy to please, so I will for sure love everything about it. Yeah,” the Cleats singer revealed.

It is worth noting that Fiennes and Claudia have been romantically involved since they met on a dating app in 2018.

The lovebirds announced their engagement on September 24, 2025.