Michael Angarano, John Early and Brandon Perea are among her character’s love interests, as well as a surprise onscreen face: Finneas O’Connell, the musical superstar and 10-time Grammy winner ...

Billie Eilish is celebrating a very special birthday, that being of her close friend Claudia Sulewski, aka her brother Finneas O'Connell's longtime girlfriend. The singer, 22, has been friends ...

Billie Eilish and brother Finneas O'Connell paid a visit to an elementary school in Los Angeles and taught kids how to write songs on the latest episode of 'Celebrity Substitute.' ...

Billie Eilish’s brother Finneas Baird O'Connell is experiencing mixed emotions as he prepares for his solo world tour, leaving his younger sister behind. "It’s been very bittersweet," he ...

In a clip premiering exclusively with PEOPLE on Wednesday, Dec. 18, Billie Eilish and brother Finneas O’Connell appear on the latest episode of Celebrity Substitute — and teach a class of ...