Everything You Need to Know About Nicky Hilton's Lavish Wedding

See photos of her ornate lace gown.

— -- Nicky Hilton wore an ornate lace gown to her wedding today.

The hotel heiress, whose dress was reportedly designed by Valentino, wed James Rothschild at the Kensington Palace Orangery in the groom's hometown of London.

Built in 1704 for Queen Anne, the Orangery was meant to be not only a greenhouse, but also a space for her to entertain guests.

Hilton, 31, told Avenue magazine in May that her dress was a "no-brainer," and is said to be Valentino.

"I really just want everything traditional and beautiful," she told the magazine. "So many brides today want avant garde, over the top, fashiony. I just like sticking to what works."

This is the second marriage for Hilton, who was married to money manager Todd Meister for several weeks in 2004. She and Rothschild, one of the heirs to the European banking dynasty, announced their engagement last August after about three years as a couple.