How Old Is Billie Eilish In 2024. After pretty much melting the internet with her british vogue cover story last week, anticipation for billie eilish’s new album, happier than ever, is at a fever pitch. At just 22 years old, billie eilish is already one of the most celebrated musicians of her generation.

Billie eilish and finneas o’connell just made oscar history. Finneas and billie eilish at the academy awards in march 2024.