Jeff Bezos and Lauren Sanchez grin from ear-to-ear as they leave VERY star-studded engagement party after celebrating alongside A-list pals like Kim Kardashian, Robert Pattinson, Oprah, and Miranda Kerr

Lauren Sanchez and Jeff Bezos hosted a very star-studded engagement party that was attended by the likes of Kim Kardashian, Khloe Kardashian, Kris Jenner, Robert Pattinson, Suki Waterhouse, Oprah, and Miranda Kerr.

The couple seemed in high spirits, grinning from ear to ear as they exited the celebrity-filled bash on Sunday evening, which took place at Diane von Furstenberg and her businessman husband Barry Diller's sprawling home in Beverly Hills.

The soon-to-be husband-and-wife flashed big smiles as photographers caught them driving off together after the event.

While much of their outfits were hidden, a glimpse of their dazzling looks peaked through from the back seat of the car.

Lauren, 53, was spotted donning an enormous eye-popping two-tiered diamond choker necklace, matching earrings, and a busty, strapless gown while Jeff, 59, for his part, opted for a black top with a white suit jacket on top. 

The former journalist kept her long brown locks loose and wore bold makeup, which included a smokey eye and a pink lip gloss.

Other Hollywood A-listers at the celebration included Salma Hayek, Jessica Alba, Cash Warren, Rita Wilson, Barbra Streisand, and James Brolin.

They also partied alongside a slew of moguls like billionaire investor Nicolas Berggruen, venture capitalist Aviv 'Vivi' Nevo, Snap, Inc. CEO Evan Spiegel, jewelry designer Jennifer Meyer and her boyfriend, creator of the management firm Ogunlesi group, Geoffrey Ogunlesi.

SKIMS founder Kim looked fashionable in a snake print-patterned ensemble, while her sister, Khloe, had on in a chic, skin-tight turtleneck brown dress.

Rita opted for a sparkly black number. It's unclear why her husband, Tom Hanks, didn't attend.

As for Miranda, she stunned in a halter dress, while her husband, Evan, wore a dark top.

According to an onlooker, around 200 guests attended the soirée, which ended around midnight.

'Jeff and Lauren were one of the last to leave,' the eyewitness added.

While it's unclear when they first got together, Lauren and Jeff's romance was first exposed by the National Enquirer in January 2019, while they were both married to other people.

Soon after, the Amazon founder divorced his wife-of-over-25-years and the mother of his four children, Mackenzie Scott, while Lauren left her husband, co-CEO of Hollywood powerhouse agency WME, Patrick Whitesell. 

The businessman - who is the third richest man in the world and has a reported net worth of $165 billion - and the TV personality then made their first public appearance together in May of that year, and have been happily in love ever since. 

They got engaged back in May, and Jeff popped the question on his mega-yacht after they enjoyed a romantic dinner under the stars together.

Lauren opened up about his proposal to Vogue this week during a joint interview with her beau, revealing that she 'blacked out' when she first saw her huge, pink diamond ring.

She told the publication that Jeff had concealed the piece of jewelry under her pillow, which she discovered at the end of the evening just before they went to bed.

When asked about their wedding, Lauren admitted that they were still in the early stages of planning, so they didn't have a lot figured out just yet.

'We're still thinking about the wedding and what it's going to be. Is it going to be big? Is it going to be overseas? We don't know yet,' she dished, adding she was more focused on Jeff's upcoming 60th birthday party in January.

And don't expect one of the world's richest men to get involved, as he joked with the publication when he was asked if he was going to get involved in the planning, 'Oh, God, no. Do I look that dumb?'

As for whether or not Lauren will be taking her husband-to-be's last name, she admitted: 'Uh, yes, one hundred percent. I am looking forward to being Mrs. Bezos.'

Barry, who hosted the engagement party on Sunday with his wife Diane, confirmed to the outlet that they would be holding the celebration at their home.

'She’s a sparkler in Jeff’s life,' he gushed of Lauren. 'They’re very in love with each other - they’re demonstrably in love. She’s lit him up in the nicest ways. She’s a great stimulant.'

During the loved-up couple's interview, Jeff couldn't stop praising his fiancée. He said, 'She has an amazing intuition, almost witchy powers in that regard. 

'She sees things that other people don't see. She's really very sensitive to other people and what they're thinking.'

Jeff added that Lauren has taught him to 'put more energy' into his relationships, especially with his kids.

'She has really helped me put more energy into my relationships. She's always encouraging me: "Call your kids. Call your dad. Call your mom,"' the business mogul said.

'And she's also just a very good role model. She keeps in touch with people. I've never seen her put makeup on without calling somebody. Usually her sister.'

Lauren, on the other hand, described her other half as 'the life of the party' to the publication. 

'He's just extremely enthusiastic, and extremely funny. He can be really goofy. I mean, you've heard him laugh, right?' she said of her Amazon founder partner.

The couple - who announced they were relocating from Seattle, Washington, where Jeff started Amazon in his basement to Miami, Florida, where he grew up earlier this month so that he could be closer to his parents - also addressed rumors that the curvaceous wooden figurehead on the front of his boat was constructed to look like Lauren.

The boat, which stretches across 416-feet and reportedly cost Jeff half a billion dollar, has a statue that bears a striking resemblance to Lauren - but she insisted it was just a coincidence.

'I'm very flattered, but it's not [inspired after me],' the media personality insisted to Vogue.

Instead, she said it was modeled after one of Jeff's favorite mythological figures, Freyja, Norse goddess of love, fertility, war, and gold.