American singer-songwriter Billie Eilish's brother Finneas O'Connell has stood up for his younger sister after she was criticized on social media for her relationship with The Neighborhood vocalist Jesse Rutherford due to their 10-year age gap.

According to People magazine, an American weekly magazine, a TikTok user reposted one of O'Connell's TikToks and wrote, "Your sister's dating a 31-year-old man and your music is s--ty." Responding to this, Finneas commented, "I want my sister to be happy and safe and she is a 21-year-old adult perfectly entitled to make her own life decisions."