Catherine, Duchess of Cambridge attends the wedding of Emily McCorquodale and James Hutt at The Church of St Andrew and St Mary, Stoke Rochford on June 9, 2012 in Grantham, England. Credit: Indigo/Getty Images (2)

Leave it to Kate Middleton to subtly work in one of summer's hottest hairstyles.

On Saturday, the Duchess styled her glossy brunette hair into a half-up, half-down 'do, with the top section pinned back in a braid. She topped off her pretty plait with a sophisticated hat.

The 30-year-old was accompanied by her husband Prince William, 29, as they made their way to a friend's wedding in Grantham, England. Middleton wore a floral Jenny Packham dress, a knee-length Katherine Hooker coat dress and her favorite nude L.K. Bennett pumps while William wore a long-tailed suit jacket and striped pants.

Besides her fashion-forward braided hairstyle, the stylish royal also wore the $75 fake diamond and pearl earrings, which she debuted at Queen Elizabeth II's Jubilee service last Tuesday.

The budget-friendly sparklers designed by jewelry designer Belinda Hadden sold out almost immediately once fashion-savvy fans of the Duchess took notice.

"Within the next 24 hours, I had sold out. I sold 60 on my website, which is the amount I would usually sell in a whole year," Hadden explained to the Daily Mail.