Jeff Bezos and Lauren Sanchez

Jeff Bezos and Lauren Sanchez are kissing like there’s no tomorrow -- playing lovestruck teens while cruising to their fairy tale wedding rehearsal in Venice … while all the world watches.

The PDA was full throttle -- the couple were smooching and waving like royalty from their water taxi Thursday, with Jeff grinning ear to ear and Lauren beaming just as hard ... looking surprisingly comfortable for someone dripping in extreme, skintight couture

Lauren was serving bombshell -- rocking a sculpted off-the-shoulder midi with a metallic bodysuit that snatched her waist to perfection. If there was a pre-wedding health kick, it definitely did the job!

Jeff Bezos and Lauren Sanchez have a big surprise for their A-list wedding guests -- whisking them away to a top secret location, but before they depart they gotta part ways with their phones ... TMZ has learned.

The wedding festivities are in full swing right now ... with some of the celebs sitting down for a fancy rehearsal dinner ahead. After that, our sources tell us all the guests are heading to a mystery island near Venice -- but, no one's been told where the fun's going down.

We're told most of the Bezos-Sanchez partygoers spent most of Thursday lounging by the pool of the swanky Hotel Cipriani, and some others chilled at fabulous restaurants around the Floating City.

Jeff Bezos and Lauren Sanchez are going with a DJ instead of a live band for at least one performance during their wedding week ... and, they're bringing out the best -- Kygo!

Multiple sources connected to the couple and Kygo tell TMZ ... the Norwegian DJ is headed to the City of Canals this week to perform at one of Jeff and Lauren's many wedding events.

We're told Kygo's a close friend of the soon-to-be husband-and-wife duo ... and, he's ready to rock the iconic Italian city to celebrate their love!

Orlando Bloom is psyched to let loose at the Bezos/Sanchez wedding, and all indications are ... he's now a single man.

Sources in the know tell TMZ ... Orlando may make his debut as a single man during the festivities. As one source put it, "He's the life of the party and he's gonna hit the dance floor hard!"

We're told Orlando might even sneak away with Leo DiCaprio for some bar crawling!

Not all Venetians are losing sleep over Jeff Bezos and Lauren Sanchez tying the knot in their city -- in fact, TikToker and proud local Giulia Raffaello is welcoming the whole circus with open arms.

Giulia joined us Tuesday on "TMZ Live" to point out ... this isn’t the first celeb wedding Venice has hosted, and when done right, these events breathe life into the floating city. Think support for small businesses, jobs for locals and a rare spotlight on forgotten Venetian gems.

While critics and protestors are up in arms over Bezos' billions, Giulia says the focus should be on what’s really impacting Venice day to day -- not a couple dropping serious cash and lots of good intentions for local citizens.

And about all those heavily scheduled wedding events? Giulia’s betting the merchants of Venice ... boat drivers, flower vendors and other community pros are already in the mix.

Jeff Bezos and Lauren Sanchez don't want any gifts for getting married ... and their wedding invite says as much.

The billionaire and his fiancée sent out wedding invites making it clear they don't want presents and are instead making donations in their guests' honor to organizations that benefit Venice, Italy, where the wedding is happening.

The invitation, first obtained by 'GMA,' features a bunch of imagery from Venice ... canals and gondolas ... plus shooting stars, birds and butterflies.

A handful of businesses in Venice, Italy are reaping the rewards of the Jeff Bezos and Lauren Sanchez wedding -- but, others are worried their city is ripe for a terrorist attack with local authorities focused on the days-long event and subsequent protests.

TMZ spoke with several Venetian businesses, and most were more worried about what the wedding will do to the city -- rather than being optimistic about what it would do FOR the city.

An employee of the historic restaurant Enoteca Al Volto tells TMZ ... she and locals she's chatted with only reaction to the wedding is fear city leaders and law enforcement are so laser-focused on security for the roughly 200 A-list, ultra-wealthy guests ... a blind spot may exist for a terrorist attack.

Ivanka Trump is rolling into Venice serving looks -- sunnies on, chic 'fit locked in, and Jared Kushner by her side -- all set to slay at Jeff Bezos and Lauren Sanchez’s luxe 'I do’s.'

Catch the pics -- Ivanka was giving full-on sweltering Euro summer vibes in a patterned two-piece set as she and Jared boarded a boat Tuesday, likely en route to the ultra-posh Aman Venice hotel ... aka HQ for Bezos, Sanchez, and their A-list wedding squad.

With under 200 names on the guest list, Ivanka was a no-brainer -- especially with that effortlessly luxe style that screams VIP and upscale glam.

Jeff Bezos and Lauren Sanchez have range -- they and their guests will move from PJs to Gatsby-esque fashion during the 3 day festivities.

Sources with direct knowledge tell TMZ ... one of the theme nights will be a swanky cocktail party where guests will dress like F. Scott Fitzgerald's famed character.

We're told lots of the guests have had designers turn the imaginary outfits into real life.

Jeff Bezos and Lauren Sanchez's wedding will be the G.O.A.T. -- or at least in the presence of one ... 'cause TMZ Sports has learned Tom Brady is slated to attend the festivities!!

We're told TB12 is one of countless big names on the guest list for the Amazon billionaire's nuptials in Venice this week ... even though just under 200 people are expected to be there.

TB12 and Bezos have gotten pretty chummy over the years -- in fact, they're neighbors at Indian Creek in Miami ... also known as "Billionaire Bunker."

Jeff Bezos and Lauren Sanchez have made their mark in St. Mark's Square, and everywhere else in Venice ... they've become a legit tourist attraction!!!

Lifelike statues of Mr. Amazon and his future billionaire bride popped up around the sinking city, where tourists posed next to Jeff as the wedding looms.

Jeff may want to steer clear of his likeness. His 5'7" muscular frame is dwarfed by the 6' sculpture. The statue is festooned with fake dollar bills with his mug on it!

Jeff Bezos and Lauren Sanchez's wedding guests will want for nothing ... 'cause they're reportedly spending an eyepopping $50,000 per person for their ritzy Venetian wedding!

The sky-high number comes from a report from Brides.com ... and with a guest list just under 200 people, that's a minimal $10 million wedding.

Of course, that's just pocket money for someone who is rolling in it. Remember ... the Amazon founder is estimated to be worth $230 billion, per Bloomberg.

Tony Gonzalez will watch his ex, Lauren Sanchez, wed Jeff Bezos in-person this week, TMZ Sports has confirmed.

Sources tell us the Hall of Fame tight end -- who shares a son with Sanchez -- is on the guest list for the big Bezos bash out in Venice, Italy ... as is his current wife, October Gonzalez.

The two already appear to be in the area getting ready for the extravagant ceremony -- as they've been spotted moving around all over Europe the past few days.

Venice might sink from all the luggage guests are bringing to the wedding of Jeff Bezos and Lauren Sanchez ... because they've got to pack everything under the sun for a bunch of hoity-toity theme parties ... so forget about carry-ons!!

Sources tell TMZ ... Jeff and Lauren's wedding itinerary features 3 theme parties, including a pajama-themed bash, so guests will need clothes, outfits and accessories for a wide range of events. No light traveling here.

The wedding will likely have a rehearsal dinner, reception and some cocktail parties ... so guests will have a ton of other crap to pack ... and we haven't even gotten to the actual nuptials. At least the weekend foam party required little more than swimwear.

The pull-out-all-the-stops wedding of Jeff Bezos and Lauren Sanchez in Venice, Italy, is imminent ... and TMZ has learned more names of the stars, industry titans and well-connected entrepreneurs who'll be front and center.

Among the power players confirmed for the days-long event is Michael Kives, the billionaire Canadian investor and former CAA talent agent. MK is well-known for his extensive network and influential connections. One of his buddies told TMZ his parties have more famous people than an Oscar event. He's best friends with Jeff and Lauren.

TMZ has learned ... iconic fashion designer Diane von Fürstenberg and her son, business and socialite Alexander von Fürstenberg are also confirmed.

Jeff Bezos and Lauren Sanchez are pulling out all the stops for this week's wedding, and one of the venues they've locked down is considered the crown jewel of the island.

The venue -- Fondazione Giorgio Cini -- is a cultural center on the island of San Giorgio Maggiore. It's a pretty new building, as Venice goes ... 1951. It was established by Vittorio Cini to commemorate his son Giorgio, who died in a plane crash 2 years earlier.

The cultural center has a treasure trove of historic items from Venice, including visual arts, music, literature, etc.