"When in doubt, always err on the side of caution," an etiquette expert told Newsweek about wedding-guest costumes.

Especially after 40, finding the perfect wedding guest dress is about pieces that make you feel comfortable, confident and of ...

I'm not wild about her dress here, but the hat really sells ... and Another Guest All three of these women have great headgear at Harry and Meghan's wedding, but I do believe the gold medal ...

A headpiece is the most important accessory for the summer wedding ... hat is fitted with a snug cotton jersey band which not only keeps it on your head, but makes it comfortable. Perfect to wear ...

Learn more! Especially after 40, finding the perfect wedding guest dress is about pieces that make you feel comfortable, confident and of course, camera ready. That’s why we rounded up these 21 ...

guests break out their coolest, most innovative accessories for the occasion. So, without further ado, sit back and enjoy the most magnificent hats, and fascinators from royal wedding history.