Billie Eilish Is 'Terrified'
About Her 18th Birthday Eilish's birthday is on December 18th. She has some concerns that potential haters
could come out of the woodwork and make
their feelings known once she isn't a child anymore. Billie Eilish, to 'Extra' Billie Eilish, to 'Extra' Eilish recently praised her brother,
Finneas, and said they have been
"best friends forever." Billie Eilish, via statement