The hotel heiress wed England-based banker James Rothschild at Kensington Palace in London on Friday, PEOPLE has learned.
Hilton, 31, wore a long-sleeved, ivory and silver guipure Valentino Haute Couture gown embellished with crystals as she and her new husband left the palace's Orangery on Friday evening.
After Hilton and Rothschild began dating in 2011, the European banking heir popped the question to Hilton last August during a romantic boating trip on Italy's Lake Como.
"They're just perfect for each other. They're best friends," Paris, 34, previously told PEOPLE of the couple. "They're so loyal and they're so in love. They're the ultimate couple. They're like a prince and princess."
At the reception, the bride's brother Barron posted a shot on Instagram of his rose-covered, candlelit table that revealed guests began the lavish reception dinner with crab and lobster Louis with spiced tomato and horseradish dressing.
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And in another Instagram photo from Friday, the proud big sis summed up the spirit of the special day: "Once in awhile, right in the middle of an ordinary life, love gives us a fairy tale."