Celebrity After-Hours: The Royal Partyers From the Duke and Duchess of Cambridge to Princess Beatrice's sneakers, see the comings and goings from the big bash at Buckingham Palace By Melissa Liebling-goldberg Published on May 1, 2011 11:00 AM Share Tweet Pin Email Trending Videos 01 of 06 DUKE AND DUCHESS OF CAMBRIDGE Dan Kitwood/Getty Another sweet moment for the newlyweds! Having changed into her second Alexander McQueen dress, Duchess Catherine sits tight next to her husband as they make their way to Buckingham Palance for their last party of the night, hosted by William's father Prince Charles for a select 300 guests. 02 of 06 CAROLE AND PIPPA MIDDLETON Bauer-Griffin It's no wonder the British press dubbed Kate's sister "Her Royal Hotness." The maid of honor made her way to the reception in a custom emerald green Temperley London satin gown with Aruna Seth silver heels, while equally gorgeous mom Carole Middleton swapped her baby blue Catherine Walker day suit for a tiered black gown with glittering jewelry for the bash. 03 of 06 ZARA PHILLIPS AND MIKE TINDALL Dan Kitwood/Getty Is she taking notes for her own wedding? The groom's cousin changes from her elaborate hat into an equally done updo and plunging dress to attend Prince William's exclusive party with her rugby player fiancé. 04 of 06 PRINCESS EUGENIE, CHELSY DAVY AND PRINCESS BEATRICE Rory Fisher/Splash News Online Prince Harry's on-again girlfriend (clad in her second Alberta Ferretti look of the day) catches a ride with his cousins – who left their love for dramatic hats to the daytime festivities. 05 of 06 PRINCESS BEATRICE Danny Martindale/Getty She may never skimp on her famously elaborate hats, but even the stylish princess needed to change into sneakers after a night filled with dancing, toasts and a performance by singer Ellie Goulding. 06 of 06 PRINCE HARRY Rory Fisher/Splash News Online He may have partied well past 3 a.m., but the best man manages to still look dapper in his unbuttoned tuxedo shirt as he catches yet another ride.