People.com Royals Meghan Markle and Kate Middleton Wear Tiaras — So Why Don't Princesses Beatrice and Eugenie? Princess Beatrice and Princess Eugenie are known for their whimsical hats, but neither have worn the most glamorous type of royal headpiece there is: tiaras By Stephanie Petit Stephanie Petit Stephanie Petit is a Royals Writer/Reporter at PEOPLE. She has been with the brand since 2016 after graduating from The College of New Jersey and holding previous positions at Seventeen, CBS Radio and more. Follow the proud dog mom on Twitter at @stephpetit_ for the latest on Queen Elizabeth's corgis. People Editorial Guidelines Published on August 23, 2018 03:19 PM Share Tweet Pin Email Princess Beatrice and Princess Eugenie are known for their whimsical hats, but neither have worn the most glamorous type of royal headpiece there is: tiaras. Queen-to-be Kate Middleton wears the ultimate sparkling accessory for special occasions — including the Queen’s Cartier Halo tiara on her wedding day in 2011 and the the Queen Mary’s Lover’s Knot tiara for a white-tie palace party last year. And the Duchess of Sussex, Meghan Markle, stunned in the Queen Mary Diamond Bandeau at her May wedding to Prince Harry. So why can’t Queen Elizabeth’s own granddaughters try one on? Although Princess Beatrice and Princess Eugenie are directly related to the monarch, there’s one big difference between them and their cousins’ wives: marriage. It’s tradition that tiaras are reserved for married women, and most royal brides wear tiaras for the first time on their wedding day. (There are, however, exceptions: Elizabeth’s only daughter, Princess Anne, wore one at age 17 to the state opening of Parliament, and Princess Margaret wore them on and off throughout her life.) Getty (3) Indigo/Getty Chris Jackson/Getty Images Max Mumby/Indigo/Getty Can’t get enough of PEOPLE’s Royals coverage? Sign up for our newsletter to get the latest updates on Kate Middleton, Meghan Markle and more! The good news is royal fans won’t have to wait long for Eugenie to sport her first tiara. The younger daughter of Prince Andrew is set to marry fiancé Jack Brooksbank on Oct. 12, and it’s widely expected that a stunning headpiece will be part of her bridal look. The odd-on favorite is the York Diamond Tiara, which her mother Sarah “Fergie” Ferguson wore at her wedding to Prince Andrew. The sparkler, which was commissioned especially for Fergie as a gift from Queen Elizabeth for her wedding, would carry a special meaning for the bride. Anwar Hussein/Getty Images Jonathan Brady/Pa/Getty Which Celebrity Pals Are Likely to Be Surprise Guests at Princess Eugenie’s Royal Wedding? Of course, Eugenie can always follow in Kate and Meghan’s footsteps and borrow another accessory from her grandmother for the big day. Queen Elizabeth loaned Kate the Cartier Halo tiara on her wedding day, and Meghan also wore a tiara straight from the Queen’s jewelry vault.