Billie Eilish celebrates new album's release with Family and Friends

Happier Than Ever is out!

Musician Billie Eilish celebrated the big day of her sophomore album’s release surrounded by her closest friends and family. On Thursday night, the 19-year-old singer did a countdown party to celebrate the release of her album Happier Than Ever in Beverly Hills mansion with a theme that resembled the 1950s era.

Billie’s mom, brother Finneas and her boyfriend Matthew Tyler Vorce were all present at the party. After the countdown to 9 p.m. PST, the album was released on Spotify, and to celebrate, Billie jumped into the swimming pool while fully dressed and danced to commemorate the moment with her friends and beau.

The singer’s boyfriend Mathew seemed to be getting along really well with Billie’s family. An insider told PEOPLE, "When the album dropped, they were very sweet. He was hanging out with her family. He seems very much a part of their life."

"She had the biggest smile on her face," the source added.

Billie’s big night had would’ve big incomplete without her close friends, including his brother’s girlfriend Claudia Sulewski, Khalid, Eric André, Olivia Rodrigo, Dove Cameron, Will.i.am, Ben Platt and Amanda Kloots, along with Willow and Jaden Smith.