Pippa Middleton's Evening Dress Designer Speaks

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Pippa Middleton -- fashion icon?

Kate Middleton's kid sister and maid of honor stunned in a sexy, floor length emerald green dress at Friday night's royal wedding reception. Alice Temperley, the designer of Pippa's second dress, tells Us Weekly exclusively what it was like collaborating with the socialite. 

"It was a wonderful opportunity and an honor to work with Ms. Pippa Middleton," Temperley says. "She is a beautiful young woman, with such elegance and looked stunning at the reception."

Earlier in the day, Middleton wore a more demure white dress designed by Sarah Burton of Alexander McQueen.

Her newlywed sister, Kate also dazzled at Buckingham Palace.. The bride donned a second dress -- also designed by Burton -- and ditched the Queen's tiara for the nighttime celebrations.

Commemorate Will & Kate's big day with our Us Collectors Edition: Royal Wedding with photos and details from the wedding. Available for pre-order now and on sale May 6.