Spectators arrive at Royal Ascot in 1913. Getty Images
A women at Royal Ascot circa 1920 wears a white charmeuse and georgette Grecian dress, a wide-brimmed hat decorated with feathers and short gloves. Getty Images
Visitors to Ascot racecourse in June 1921, dressed in their finery. Getty Images
Alice Pearl, Lady Montagu of Beaulieu at Ascot races in June, 1927. Getty Images
Visitors to the second day of the races at Ascot in June, 1927. Getty Images
Women arrive at the race on June 12, 1951. Getty Images
Racehorse owner Madame Suzy Volterra at Royal Ascot on June 17, 1952. Getty Images
Model Fiona Campbell-Walter, as known as Baroness Thyssen-Bornemisza, wears a black straw hat and a white corded suit in 1953. Getty Images
June Laverick attends the first day of the Ascot races on June 18, 1957. Getty Images
Journalist and novelist Una-Mary Parker arrived wearing a flamboyant hat decorated with red silk rose. Getty Images
Queen Elizabeth II and Prince Philip arrive in a carriage in June, 1969. Getty Images
US actor Larry Hagman raising his hat at the Royal Ascot races June 10, 1980. Getty Images
Australian comedian Barry Humphries, dressed as his most famous character Dame Edna Everage, in a hat based on the Sydney Opera House. Getty Images
British actress Nina Baden-Semper attends the races at Ascot in 1972. Getty Images
US actress Rita Hayworth arriving at Ascot on June 13, 1950. Getty Images
A woman wearing a white organza hat during Royal Ascot on June 22, 1972. Getty Images
Models Marie Helvin and Jerry Hall at Royal Ascot in 1982. Getty Images
Sheikh Mohammed Bin Rashid, Vice President and Ruler of Dubai, at Royal Ascot in 1987. Photo: Allsport
Ascot visitors' outfits in 1982. Photo: Allsport
A women wears a pink hat in 1995. Photo: Allsport
Trinny Woodall arrives at Ascot for Ladies Day in June, 2001. Photo: Allsport
Alice Ascoli attends Ladies Day in a hat made of three hats in 2004. Getty Images
Princess Eugenie and Prince Michael of Kent attend Ladies Day on June 18, 2009. Getty Images
Danielle Lineker attends Royal Ascot on June 15, 2010. Getty Images
A women dresses as Marie Antoinette, 2011. Getty Images