What better way to commemorate Billie Eilish’s 21st birthday than with a group of A-list celebrity pals?

Her celebration served as further proof that she is one of the world’s most sought-after vocalists.

The Edition hotel in West Hollywood hosted the celebrated singer’s birthday party this year, which had a Christmas theme.

Leonardo DiCaprio, Jared Leto, and Timothee Chalamet are among her well-known guests, according to The Sun.

Models Kendall Jenner and Hailey Bieber were also present, and they even posted a few “Billie’s 21st”-stamped photos of the couple from the photo booth to their Instagram accounts.

According to a person who spoke with the site, the “who’s who” of the entertainment industry attended the “Happier Than Ever” singer’s birthday party.

Celebrities such as Noah Cyrus, Olivia Rodrigo, Avril Lavigne, and Lil Nas X were in attendance, as were copious amounts of alcohol and food.

The insider said:

“Billie even had a hot chocolate station constructed so guests could dip gingerbread men into the beverages. She made sure there was a Christmas vibe with the food.”

Billie Eilish was dressed in a red Santa suit, and attendees were encouraged to dress in festive attire.

The evening’s highlight, however, was when Doja Cat began singing “Happy Birthday” to her and everyone else began to join in.

In party video clips shared on social media, Billie can be seen dancing and posing with her friends.

Her boyfriend, Jesse Rutherford, joined her in celebrating the occasion.

According to the source, she couldn’t stop smiling, and Jesse was the consummate gentleman, making sure she had everything she needed.

“Billie and Jesse are a really wonderful pair, and they were all over each other.”

Billie was also spotted with her boyfriend, who was dressed as Santa to match her and was holding a champagne flute because she is of legal drinking age.

In a recent interview with Vanity Fair, Billie opened up about her relationship with The Neighbourhood’s lead singer, saying:

“I simply am very inspired by this person, and, you know, he’s inspired by me. It’s really amazing, and I’m really delighted, and I’m really glad about it.”

Say what you want, but I’m in charge right now, the Grammy Award-winning singer said in response to criticism of their relationship due to their 10-year age difference.