Congratulations are in order for Nicky Hilton, who has married James Rothschild in a romantic ceremony in London. The couple, who got engaged in August 2014, said "I do" in front of their family and friends at The Orangery in Kensington Palace on Friday.

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Nicky Hilton showed off her Valentino wedding dress as she left Claridge's

The beautiful bride stunned in a bespoke Valentino dress, which she proudly showed off as she left Claridge's hotel, on her way to the venue.

"Ever since I was a little girl I wanted Valentino to design my wedding dress. Valentino is the definition of timeless elegance, I don't think there's another couture house like it," the bride exclusively told Harper's Bazaar ahead of her big day.

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A closer look at the stunning bride

Nicky was closely followed by her older sister Paris Hilton, who wore a long light blue gown. Meanwhile her flower girls looked pretty in dresses from luxury childrenswear designer Marie Chantal.

Guests at the couple's nuptials are thought to include Paris' boyfriend Thomas Gross, Chelsea Clinton and her husband Marc Mezvinsky, and Florence Brudenell-Bruce with husband Henry St George.

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Paris Hilton wore a full length light blue gown

Close friend Petra Stunt will also be amongst the guests. The couple famously met at Petra's wedding to James Stunt back in 2011, with Nicky later saying it was love at first sight. James popped the question during a romantic holiday to Lake Como in August, presenting his wife-to-be with an incredible five-carat Asscher cut diamond ring.

So happy that my sister found the man of her dreams. They make the perfect couple! So excited for their wedding today! 🎉🎉🎉 #MrsRothschild ❤️👰🏼❤️ A photo posted by Paris Hilton (@parishilton) on Jul 10, 2015 at 6:52am PDT

The couple's choice of wedding location couldn't have been more fitting for their fairy-tale day. Located within Kensington Gardens, The Orangery is licensed for civil weddings and allows for receptions on its terrace. It is also located next door to Prince William and Kate's apartment.

The new Mr and Mrs Rothschild are expected to keep the party going late into the night with a rumoured performance from Lionel Richie before Paris takes over the decks with a DJ set at the end of the night.