Nicky Hilton looked absolutely stunning in her full lace Valentino wedding dress.

The 31-year-old hotel heiress married James Rothschild on Friday at Kensington Palace, home to Kate Middleton and Prince William, according to E! News. She first was seen in the gorgeous dress when she stepped out of the Claridge, a luxury hotel in London.

The floral lace dress had a dramatic, flowing train, a high neck and sheer illusion sleeves. She held a white bouquet of flowers and a delicate veil that was just as long as the train of the dress.

Her sister Paris, who was a bridesmaid, stunned in a baby blue gown with a ruched bodice, according to Us Weekly. A sparkly belt and matching heels completed her look. She wore her blonde hair in long, loose waves.

Nicky and James dated for three years before he proposed in August of last year while they were on vacation. He is the heir to a European banking family and made sure to propose in Italy where they first met.

"He took her out on about into the middle of Lake Como and he proposed," a source said at the time. "Got down on one knee and everything. It was incredibly romantic and beautiful."

Paris took to Instagram this morning prior to the wedding to show her love for the happy couple.

"So happy that my sister found the man of her dreams," she captioned a photo of the two kissing. "They make the perfect couple! So excited for the wedding today! #MrsRothschild."

Paris is pretty in love herself! Last night while celebrating wedding festivities, she posted a photo of her and her new boyfriend Thomas Gross, calling him her "soulmate" after just a few months of dating.