Billie Eilish’s older brother, Finneas, has come to her defense amid controversy surrounding her relationship with the older rock star Jesse Rutherford.

The “Bad Guy” singer, who recently celebrated her 21st birthday, faced criticism after making her public debut with the 31-year-old lead singer of The Neighbourhood.

In response to a TiƙToƙ comment by user “gaybutboring,” where Finneas was criticized for his music and questioned about his sister’s relationship, he defended Billie, stating, “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.”

Addressing the debate on Twitter, fans discussed whether Finneas should intervene in his sister’s relationship. Some emphasized Billie’s autonomy as an adult, while others expressed support for her choices.

Billie Eilish and Jesse Rutherford, undeterred by criticism, humorously acknowledged their age gap by dressing as a baby and an elderly man for Halloween. The couple made their red carpet debut at the LACMA Art + Film Gala, wearing matching Gucci outfits and garnering attention for their unconventional quilt accessory.

In an interview with Vanity Fair, Billie spoke positively about her relationship with Rutherford, emphasizing mutual inspiration. She also addressed the backlash, asserting her control over her life choices and expressing pride in her achievements.

The couple first appeared publicly together in October, sharing a kiss outside a Los Angeles restaurant. Billie later confirmed their relationship by posting a photo of Rutherford on her Instagram. According to a Jesse Rutherford fan account, the two have known each other since Billie was 15 years old.