Jeff Bezos, Lauren Sanchez Wedding Details Revealed: 7 Things to Know

Billionaire Amazon founder Jeff Bezos and his fiancée, Lauren Sanchez, are getting married in Venice, Italy, in what is expected to be a multi-day bash filled with big-name celebrities.

Top names like Oprah Winfrey and Leonardo DiCaprio are expected to be on the guest list.

Here are seven interesting things to know about the Bezos-Sanchez nuptials, from her massive rock to the venue.

1. Her engagement ring is worth $2.5 million

Sanchez has shown off her massive engagement ring before. According to Page Six, it's a 20-carat rock that is worth about $2.5 million.

The couple dated for five years after Bezos' split from his first wife.

2. The venue was changed at the last minute

Protests have erupted in Venice, the location of the wedding, so the couple changed the venue at the last minute, Reuters reported.

They chose a more isolated location due to security concerns. Initially, according to the outlet, the wedding was going to be held in a "popular and central nightlife area," but it was switched to "a hall of the Arsenale, a vast 14th-century complex in the eastern Castello district."

That location has bridges that can be raised, making it impossible to access, the publication noted.

3. Top-name celebs have started arriving

Big name celebrities are expected, and some have already started arriving in Venice.

Spotted first: Ivanka Trump and Jared Kushner arrived in Venice, as did fashion designer Diane von Furstenburg, according to USA Today.

Actor Orlando Bloom and singer Katy Perry may attend, as well as Eva Longoria, members of the Kardashian-Jenner clan, Oprah Winfrey and Gayle King, USA Today reported. Leonardo DiCaprio is another rumored guest.

About 200 people are expected to attend.

4. Key details have been kept top secret, including Sanchez's wedding dress

Some details have been kept close to the vest. For example, when specifically will the wedding take place? That's not clear.

According to Fox News, the wedding festivities are supposed to run from Thursday through Sunday in Venice.

What will Sanchez's dress look like? Well, most brides don't share that until the big day. The couple did show up for a wedding "fitting" at Dolce & Gabbana before the nuptials, Page Six reported.

5. The couple held a "foam party" before the wedding

Bezos and Sanchez celebrated with a "foam party" on the billionaire's massive yacht leading up to the wedding.

Photos showed the couple covered in foam on the deck of the $500 million yacht, according to People.

6. Protests have erupted

According to CBS News, some people are protesting the wedding.

The protests ignited over long-standing concerns that the needs of "wealthy tourists" were prioritized over the interests of longtime residents, the site reported.

7. The wedding's cost is likely in the millions

Although cost estimates have varied, Fox Business reported that the couple's three-day wedding bash could cost at least $10 million.