The big day is here! Today, Prince Harry will marry Meghan Markle in Windsor, England. And while the bride will undoubtably be the best dressed person in attendance, guests have already begun to stun in a variety of dresses and fascinators. Amal Clooney chose a form-fitting yellow Stella McCartney dress for the special occasion, as well as a complementary hat. The dress, a veritable burst of sunshine, matched the day’s gorgeous weather. Serena Williams, a good friend of Meghan Markle, is also in attendance. The tennis superstar, who herself tied the knot last year in New Orleans, Louisiana, chose a pale pink Versace ensemble to wear to this morning’s ceremony. Pale pink was also the color chosen by Oprah–a very exciting surprise guest–who arrived on the scene at Windsor Castle earlier this today. And while Oprah also opted for a dress designed by Stella McCartney, Victoria Beckham looked characteristically chic in a dress of her own design. The dark hued frock is a similar color to the dress she chose for Prince William and Kate Middleton’s 2011 royal wedding. And last but certainly not least, Priyanka Chopra donned a structural Vivienne Westwood dress and jacket. Below, we round up the best dressed guests at the royal wedding so far!