Billie Eilish Pirate Baird O'Connell (born December 18, 2001) is an American singer and songwriter.

Eilish's first studio album, When We All Fall Asleep, Where Do We Go? (2019), debuted atop the US Billboard 200 and UK Albums Chart. It was one of the best-selling albums of the year, buoyed by the success of its fifth single "Bad Guy", Eilish's first number-one on the US Billboard Hot 100. The following year, Eilish performed the theme song "No Time to Die" for the James Bond film of the same name, which topped the UK Singles Chart and won the Academy Award for Best Original Song in 2022.

Eilish made her acting debut in Amazon Prime Video's Swarm. She played the role of Eva, the leader of a cult inspired by NXIVM, and received positive reviews for her character.