Pippa Middleton Wore Kate Spade to Lady Gabriella Windsor's Wedding

Pippa Middleton, always the chic wedding guest, brought her style A-game yet again on Saturday when she attended the nuptials of Lady Gabriella Windsor.

For the occasion, Duchess Kate's little sister donned a light blue floral Kate Spade dress. She paired the springy look with a preppy headband (instead of the usual fascinator), a pair of blue shoes, and gorgeous earrings that appear to be made from diamonds and sapphires.

Lady Gabriella—who is Prince William and Prince Harry's second cousin on their dad's, side—wed her longtime partner Thomas Kingston at St. George's Chapel. The bride wore a long-sleeve gown by Italian designer Luisa Beccaria, which was decorated in beautifully intricate lace. "I've been in love with her dresses for a long time and I'm so lucky to have my dream dress designed by her," the bride said of the designer. "She and her team are exceptional and I'm thrilled with the stunning result of the artistry." She topped off her wedding day look with a long veil and the same tiara her grandmother wore on her own wedding day. She carried a white and cream bouquet, and Kingston wore a boutonniere of white roses pinned to his lapel.

While neither Kate Middleton nor Meghan Markle was able to make it to the event (who, like Pippa Middleton, both always serve up A+ wedding guest attire), there were plenty of members of the royal family in attendance. The Queen and Prince Philip were there, as was Prince Harry, who took some time off from new dad duties to watch his cousin walk down the aisle just before his own one-year anniversary.