Celebrity Bridesmaid Spot: Keira Knightley

She may not have an invite to the royal wedding, but Keira Knightley attended a much more important event over the weekend – her brother Caleb’s wedding. But it seems that even a bona fide celeb like Miss Knightley doesn’t get to flout the matchy-matchy bridesmaid rule. Luckily for her, though, her new sister-in-law, Kerry, chose flattering, full-skirted dresses in deep purple for her Scottish wedding. We wonder if she ever had the urge to deck Keira out in head-to-toe lilac ruffles, à la Katherine Heigl in 27 Dresses? CS

Looking for fashion inspiration for an upcoming wedding? Just scroll down to see the best dressed celebrity wedding guests and bridesmaids