Billie Eilish Overjoyed by Finneas' Engagement to Claudia Sulewski

As of September 26, 2025, pop star Billie Eilish is overjoyed by her brother Finneas' recent engagement to his longtime girlfriend, Claudia Sulewski. The couple announced their engagement on September 22, 2025, sharing photos of the outdoor proposal and expressing their excitement to spend "forever and ever" together.

Sulewski also posted a video on TikTok showing off her new diamond ring, captioning it, "we're getting marrieddd." Eilish's reaction to the news was particularly heartwarming, as the singer reshared her brother's announcement on Instagram Stories and posted a screenshot of herself FaceTiming Sulewski on the day of the proposal, with the influencer shakily showing off her ring as an excited Eilish reacts.

Through Finneas' relationship with Sulewski, Eilish has also developed a close friendship with the influencer. The siblings and Sulewski often attend award shows as a group, and the two women appear in each other's Instagram photos from time to time. In Sulewski's 2020 pre-Oscars vlog, Eilish even entered the room and wrapped her future sister-in-law in a big hug.