STEFANO RELLANDINI/AFP via Getty Jeff Bezos and Lauren Sánchez are kicking off an unforgettable wedding week in Venice, Italy The couple treated their guests to a glamorous welcome party on Thursday, June 26 The bride-to-be wore a golden off-the-shoulder dress detailed with elaborate embroidery by Schiaparelli for the occasion, while the groom sported a classic black suit and white dress shirt Among the celebrities photographed making their way by boat to the event were Kendall and Kylie Jenner, Kim Kardashian, Khloé Kardashian, Tom Brady, Orlando Bloom and Kris Jenner Jeff BezosandLauren Sánchezare kicking off their Venice wedding festivities in high style! TheAmazon founder, 61, and the Emmy-winning journalist, 55, treated their guests to a glamorous welcome party in a closed cloister adjacent to the Madonna dell'Orto church on Thursday night, June 26. The bride-to-be wore a golden off-the-shoulder duchess satin dress for the occasion. The look — part ofSchiaparelli's Spring-Summer 2025 Haute Couture collection — featured a corseted waist and baroque floral embroidery that called to mind the city's famous carnival masks. She styled her hair in a high ponytail with face-framing pieces in the front. STEFANO RELLANDINI/AFP via Getty Bezos sported a classic black suit, which he paired with a crisp white dress shirt and aviator shades. The couple was photographed exiting the Aman Hotel ahead of the event, and the billionaire mogul could be seen helping his fiancée into a water taxi before they were whisked off to their destination. Stefano Mazzola/GC Several of the couple's many celebrity guests were also spotted making their way into boats en route to the soirée.Orlando Bloomwore a cream dress shirt and tan slacks, andTom Bradysported a white shirt and black pants and had a tan jacket slung over his arm. Kris Jennerand boyfriendCorey Gamblewere seen traveling by boat in coordinating black looks, andKim Kardashianmade a statement in a form-fitting, snakeprint dress.Khloé Kardashianopted for a sultry black dress. MARCO BERTORELLO/AFP via Getty Kendall Jenner, wearing a colorful floral dress, and sisterKylie Jenner, wearing a gold lace strapless look, stepped out together to the event. The Kardashians and Jenners appeared to be having fun, laughing and posing for photos on their boat.Leonardo DiCapriowas spotted leaving the Gritti Palace, dressed in a black suit and black cap. His girlfriendVittoria Cerettiwas later seen in a water taxi, wearing a gray dress with ruffles on one shoulder. MARCO BERTORELLO/AFP via Getty Oprah WinfreyandGayle King, who were photographedarriving at the Venice Marco Polo Airportearlier on Thursday, stepped out together for the welcome bash. The former talk show host wore a purple and white patterned dress, while the CBS News journalist wore a long tank-style dress with a gold chain print. Ernesto Ruscio/GC Images Other attendees included designer Tommy Hilfiger and his wife Dee Ocleppo Hilfiger. A source tells PEOPLE the guests arrived in a convoy of about 30 boats. Amid security concerns, police patrolled the area, including the water on jet skis. An entire canal was blocked up with boats dropping guests off at the venue. The soon-to-be bride and groom were among the last to arrive, and security created a cordon around the couple to shield them from onlookers. In one sweet moment, Bezos and Sánchez paused to kiss before disembarking from their taxi. MARCO BERTORELLO/AFP via Getty Another source tells PEOPLE the couple and their guests will be eating pizza cooked onsite by a famous Neapolitan chef. Over the course of the day, baskets of white and purple-colored flowers were brought in to decorate the venue, along with a piano. According to the insider, the atmosphere was surprisingly low-key considering the high-profile guest list. Neilson Barnard/Getty The couple has worked hard to keep the details surrounding their extravagant nuptials under wraps. They tapped event planners Lanza & Baucina Limited to help stage this week's events. Known for producing Venice weddings for A-list couples — includingGeorge and Amal Clooneyin 2014 andSalma Hayekand François-Henri Pinault in 2009 — the planners have insisted that the Bezos-Sánchez wedding won't disrupt the city — despiteongoing protestsagainst overtourism. The couple hired event planners Lanza & Baucina Limited to help stage their wedding events. Known for producing Venice weddings for A-list couples — includingGeorge and Amal Clooneyin 2014 andSalma Hayekand François-Henri Pinault in 2009 — the planners have insisted that the event won't disrupt the city — despiteongoing protestsagainst over-tourism. Never miss a story — sign up forPEOPLE's free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from celebrity news to compelling human interest stories. Mayor Luigi Brugnaroconfirmed that Bezos and Sánchez would act responsibly while hosting their nuptials in the historic Italian city. "The many speculations and fake news circulating about Jeff Bezos' wedding are completely unfounded," the mayor wrote in a statement obtained by PEOPLE, adding that only 200 guests will be invited and that the event wouldn't disrupt the city. "We are mutually working and supporting the organizers, to ensure that the event will be absolutely respectful of the fragility and uniqueness of the city," the statement continued. Dave Benett/amfAR/Getty A source shared an update withThe Associated Pressearlier this month, stating that Bezos and Sánchez are planning to source 80% of the provisions for the wedding from local vendors. Rosa Salva, the city's oldest pastry maker, is creating goody bags for attendees, while design studio Laguna B, which is known for its colorful, hand-blown Murano glass, has been commissioned to create something for the wedding. Though the couple is staying at the Aman — the same Grand Canal hotel where the Clooneystied the knotmore than 10 years ago — they have also secured rooms for their guests in four other prominent hotels including the Gritti Palace, St. Regis, Belmond Cipriani and Hotel Danieli have all been booked in part or in full. Guests have also been asked not to bring a gift for the couple and instead make a charitable donation to the city of Venice. Read the original article onPeople