Diamond Jubilee Derby Pictures

Today is Queen Elizabeth II's first official event as part of her Diamond Jubilee Central Weekend. It's the 233rd Epsom Derby — this year named the Diamond Jubilee Derby in honor of the queen's Diamond Jubilee celebrations.

The Epsom Derby kicked off with Ladies Day yesterday, and women sported eccentric hats and plenty of Union Jack attire. As the country's most prestigious horse race, the event draws a who's who of England — including, of course, the royal family. At today's event, Queen Elizabeth presented the Diamond Jubilee Coronation Cup to the winning horse, Camelot, who was trained by Aidan O'Brien and ridden by O'Brien's son, Joseph. Katherine Jenkins sang the national anthem, and members of the royal family like Princesses Beatrice and Eugenie attended the races — along with some stars including Mischa Barton — to celebrate Queen Elizabeth's big event. We've already taken a look back at the royal family's Epsom Derby presence over the years, but now we're offering a glimpse of this year's sightings. Check out the best moments from the Diamond Jubilee Derby now!