Video. Big hats, celebrities, champagne and horse racing... It's Ladies Day at Ascot!
And as well as being a festival of fashion, The Queens horse Estimate was also running in the Gold Cup.
Last year, her Majesty's horse won the race, but it wasn't the case today. Instead it was the turn of the favourite, Leading Light, to shine.
But it wasn't all about the racing. For many of the 40,000 people who attended today, its also about getting dressed up!
Cary Johnston is there for us.
Race goers at Royal Ascot will have to get their hats at the ready and dress to impress, as it's Ladies Day! The public will attend in their thousands, though at least one racing pundit says it's all about showing off.
51,000 bottles of champagne, 30,000 eclairs and nearly 3000 lobsters will be consumed in Berkshire this week as Royal Ascot gets underway.
The five day event began this afternoon with 'Toronado' ridden by Richard Hughes winning the Queen Anne Stakes. With nearly three hundred thousand racegoers expected over the next few days, organisers say they're hoping the rain will hold off.
ITV Meridian spoke to Richard Barclay, Director of Hospitality at Royal Ascot.
More than 46,000 race-goers attended the first day of Royal Ascot today.
Police say as of 6pm, there have been no arrests.
Seven of the Royal Family's figurines at Legoland have had a mini makeover in time for the Royal Ascot.
Royal hat-maker Rachel Trevor-Morgan has made intricate and specially designed hats and has described it as her "most unusual commission yet".
As well as designing the tiny hats for lego models of the Queen, the Duchess of Cornwall and the Duchess of Cambridge, she also made ones for the Duchess' mother, Carole Middleton, Princess Eugenie and Beatrice as well as Zara Tindall.
The models and their hats will be on show at Legoland in Windsor until Royal Ascot finishes on June 21st.
The Queen's hat maker has designed miniature headwear for the royal family models at Legoland in Windsor to celebrate Royal Ascot.
Rachel Trevor-Morgan's designs will be on display from today until the end of the equestrian festival on the 21st June.
Her Majesty The Queen will wear a characteristically classic and colourful straw hat in bright yellow with hand painted silk flowers measuring just a few millimetres.
The Duchess of Cornwall's dove grey side sweeping picture hat is decorated with minute feathers swirling to form an elegant circular design, whilst the Duchess of Cambridge wears an understated yet stunning Royal Blue straw slice hat with two miniature quill feathers.