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See Photos of Prince George & Princess Charlotte Looking Adorable at Aunt Pippa Middleton's Wedding

The royal children dressed up to celebrate the nuptials of mom Kate Middleton's sister, Pippa, to James Matthews. 

Pippa Middleton James Matthews wedding photo WPA Pool/Getty Images
Pippa Middleton married financier James Matthews in a stunning spring wedding at St. Mark’s Church in Englefield today, Saturday, May 20, and of course, her royal niece and nephew were part of the celebration — if not a complete focal point! (How could they not be, when they're so cute?) Prince George and Princess Charlotte, looking as adorable as ever in bespoke outfits from Pepa & Co., accompanied their proud parents, the Duke and Duchess of Cambridge — aka Prince William and Kate Middleton — to the high-profile affair.

The 3-year-old prince, who served as a page boy, looked just like his dad as a child, when he was in his uncle Prince Andrew's 1986 wedding. The 2-year-old princess, who served as a bridesmaid, beamed as she stayed close to her mom. The two joined a gaggle of other children as part of the bridal party.

Here are just a few sweet shots of the royal L.O.s hanging with their impeccably dressed mom, one another, and the all the kiddos on their aunt's big day.

Princess Charlotte and Duchess Catherine at Pippa Middleton's wedding May 20, 2017 WPA Pool/Getty Images

Prince George and Princess Charlotte at Pippa Middleton's wedding Samir Hussein/Getty Images

Pippa Middleton James Matthews wedding with children of bridal party WPA Pool/Getty Images

According to People, wedding guests told reporters that the children were “very” well-behaved during the ceremony. One guest said of the nuptials, "It was amazing. [Pippa and James] were so cute. I cried. My makeup was running." 

So sweet! Congratulations to the beautiful newlyweds and the entire royal family!