Jennifer Aniston held a secret holiday party with her fellow A-list stars and friends in the industry over the weekend. The event is reportedly star-studded and took place at her multimillion and sprawling mansion in Bel-Air.

Allegedly, the inside "joke of the night" was that the attendees considered themselves the "old guard of Hollywood." Well, as Aniston's guests are some of the biggest names in Hollywood, that joke serves true.

Page Six revealed that the likes of Sandra Bullock, Gwyneth Paltrow, David Spade, Bradley Cooper, Jason Bateman, and Tobey Maguire attended the lavish event. Netflix CEO Ted Sarandos and IAC chairperson Barry Diller were also there, along with other colleagues of Brad Pitt's ex-wife.

Of course, her former "Friends" co-stars Courteney Cox and Lisa Kudrow also joined in the fun, and her "Morning Show" co-cast members Reese Witherspoon and Mark Duplass.

Jon Hamm, who has joined the new season of the Apple TV+ series, also attended the affair with his new girlfriend and possible future wife, Anna Osceola.

According to reports, Aniston's festive event was a "no-cellphone party," though there was no rule made about it. They just simply didn't take out their phones, so no one took photos or videos or documented the eventful night to post on social media. That said, the bash was also said to be an "old-school, fun party" with a lot of "non-thirsty celebrities."

Meanwhile, though Aniston didn't post any pictures from the event, she might have prepared for it after teasing she was decorating her home for the holidays after buying a gigantic Christmas tree last week.

She also hosted a holiday party last year with another batch of A-list stars, like Rita Wilson, Laura Dern, Chris McMillan, and Bateman's wife, Amanda Anka.

The 53-year-old star has been vocal about her desire to maintain strong friendships. She even credits her tight-knit group of friends for helping her stay grounded over the years.

Aniston told People in 2019, via Daily Mail, that her pals keep her true and real, and she does the same thing to them. "It's a beautiful exchange," she said.

In addition, her longtime friend and makeup artist Angela Levin told Hello! magazine in 2020 that the Golden Globe winner's closest friends described her as the "epitome of kindness, generosity, love, and family."

They even called each other "mamma," and all the amazing women around her addressed her the same. This just showed that Jennifer Aniston is part of their hearts forever while they are all hers.