SHOP: The 5 fashion rules you must follow when it comes to occasionwearREAD MORE: How to decipher every wedding guest dress code according to a bridal expert - and what you should never wearSee more Daily Mail on Google - save us as a Preferred SourceBy JESSICA CARROLL, JUNIOR STYLE EDITOR Updated: 07:00 BST, 17 June 2026

Daily Mail journalists select and curate the products that feature on our site. If you make a purchase via links on this page we will earn commission - learn moreWith Royal Ascot finally here and wedding season well underway, we've all got special occasion dressing on our minds. We love any excuse to get dressed up - when in doubt, overdress is our motto. However, while festive event dressing is all about glamour and fun, the summer event season often comes with far stricter rules about what you can - and can't - wear. From certain hem lengths to mandatory sleeves, it can be a real minefield. However, it's headwear that, as a fashion stylist, I am most regularly questioned about. Namely, where to find styles that don't feel too fussy or frumpy. Luckily, I have lots of experience dressing celebrities and real women for special occasions like the races, garden parties and formal weddings, so know exactly where you can find the best pieces that are worth the investment. Here are the 15 best headpieces to buy for your next big event. To get more of what you love from your favourite Sunday supplement, follow us on Instagram (@youmagazine), Facebook (YOU Magazine) and X (@YOUMagSocial).