The Amazon tycoon’s fiancée, Lauren Sanchez, went all out for her husband-to-be by hosting a secret soiree at their multi-million-dollar home on Saturday night, a source exclusively told The U.S. Sun.

Jeff Bezos and his fiancée, Lauren Sanchez, spent all night showing serious PDA ahead of their nuptials, according to a sourceCredit: Getty

Jay Z and Beyoncé even made an appearance at the uber-private bash at Jeff’s estateCredit: Getty
The insider said Jeff, whose birthday was on January 12, was honored by countless A-list stars and the nerdy theme was “celestial, space-age.”

Even Jeff’s first office when he first started Amazon in the 1990s, with his old computer chair, featured in the festivities.

“Jeff had a huge blowout 60th private birthday party at his and Lauren’s Warner estate place in Beverly Hills,” the source said.

“Hundreds of people attended, and the guest list could have rivaled an Oscar bash with everyone from Jay Z, Beyoncé to Oprah there.”

Stars including Kendall Jenner, Hailey Bieber, Katy Perry, Orlando Bloom, and Bill Gates were also reportedly celebrating at the mansion.

“Despite the number of guests, everything was kept very hush-hush and they had to put their phones in pouches as photography was banned at the event,” the source went on.

“They had Jeff’s first office set up at Amazon with his original chair, it was all really touching.

“Food at the event was catered with everything from caviar to McDonald’s on offer, a nod to Jeff’s first ever job when he was just 16.

HONEYMOON STAGE

“Jeff and Lauren could barely keep their hands off each other all night. They looked very loved up and Bill Gates was also dancing with his new girlfriend, Paula Hurd.

“It was a night to remember for everyone who went and guests were partying until around 3 am, with the place full of security to keep out any crashers.

“The place was also full of Amazon execs, there were so many people. Last time they had a party in the guest house, but this one was massive.”

The U.S. Sun reached out to Bezos’s rep who declined to comment.

Although there was little mention of the party on social media, Lauren did hint at a big night by posting photographs on Instagram of her in a stunning red gown.

“Getting ready is sometimes the best part of the night,” she wrote on Sunday with a look at her outfit for the party.

“Thank you @laurabasci for creating this incredible dress for such a special evening.”

CELEBRITY GUESTS

Further stars confirmed their attendance in the comments, with Ivanka Trump writing, “Such a fun night.”

Heidi Klum added, “You are the brightest gift to Jeff. Happy birthday. We had a blast celebrating with you.”

Katy Perry also shared a photo of her glam makeup, writing, “Spaced out and starry-eyed.”

Underneath the post, Kim Kardashian and Kris Jenner confirmed they were at the bash.

“I was obsessed with this look last night!!!!” Kim wrote.

U Beauty founder Tina Chen Craig also confirmed the theme for the party in her Instagram Story.

Lauren, 54, recently debuted her new bangs on social media and shared a snap of her hair while wearing a tight black Dolce and Gabbana outfit.

Although she didn’t include her other half in the post, she wrote, “Happy birthday baby,” with a love heart emoji.

The pair celebrated his birthday in Milan before flying back to LA for his big party on a private jet.

Young Jeff Bezos seen with stacks of books before he became a billionaireCredit: Getty

Lauren and Jeff are good friends with the Kardashian family, with many attending the party to celebrate his birthdayCredit: Getty

Jeff and Lauren got engaged last year and are set to marry in a lavish ceremonyCredit: Getty