Hayley Turner becomes only the second female jockey to ride a winner at Royal Ascot and the first in 32 years after Gay Kelleway.
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As is tradition, Britain's Queen Elizabeth II leads the royal procession at Royal Ascot.
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Huge crowds once again pack the historic race course in Berkshire, west of London.
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Spectacular hats are very much in vogue at Royal Ascot.
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And Dettori adds another winner to his fabulous four from day three, including the Ascot Gold Cup.
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After a wet week, the sun is out at Ascot and racegoers are able to enjoy picnics in the car park.
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Dubai ruler Sheikh Mohammed bin Rashid Al Maktoum (yellow waistcoat) is head of the Godolphin racing operation and a familiar face at British horse racing tracks.
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Frankie Dettori riding Advertise leads the field on the run-in in the Commonwealth Cup.
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Day three —
Britain's Queen Elizabeth II presents jockey Frankie Dettori with the Gold Cup after his second straight win on Stradivarius.
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The win marks Dettori's fourth straight victory of the day and a seventh Gold Cup in all.
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The huge crowd is gripped to the action as the Gold Cup unfolded.
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Ladies' Day at Royal Ascot is when the extra special outfits are on display.
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Day three —
Frankie Dettori (yellow cap) and Stradivarius hold off Dee Ex Bee and Master of Reality to clinch a famous win on Ladies' Day at Royal Ascot.
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Britain's Queen Elizabeth II arrives in the Royal Enclosure ahead of Ladies' Day at Royal Ascot.
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Premier League footballers Peter Crouch (right) and Glen Johnson with their wives on Ladies' Day.
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Day two: —
The Royal Procession makes its way down the Straight Mile at Royal Ascot ahead of racing.
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Day one: —
Britain's Queen Elizabeth II riding in the leading carriage during the Royal Procession to open Royal Ascot 2019.
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Taiwanese model, actress and singer Lin Chi-ling is one of a host of celebrities at Royal Ascot Wednesday.
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Veteran Italian jockey Frankie Dettori treats the crowd to his trademark flying dismount after clinching his 61st winner at Royal Ascot in the opener.
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The heavens opened later Wednesday as Frankie Dettori rode Crystal Ocean (right) to victory in the showpiece Prince Of Wales's Stakes.
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Britain's Catherine, Duchess of Cambridge and Prince William enjoy the occasion despite the rain.
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Queen Maxima is full of smiles as she waved to racegoers.
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Royal Ascot is a highlight of the British sporting and cultural calendar.
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The event features five days of world-class horse racing and high fashion.
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Racegoers are encouraged to express themselves within the confines of a strict dress code.
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New Zealand model Georgia Fowler is among a host of celebrities in attendance on day one.
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Hats are an essential Royal Ascot accessory.
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Light rain Tuesday couldn't dampen spirits at Royal Ascot in Berkshire, west of London.
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Upmarket picnics in the car park are a Royal Ascot tradition for some.
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Daniel Tudhope rode Lord Glitters (grey) to victory in the opening Queen Anne Stakes on day one.
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Ryan Moore rode Circus Maximus (second left, white cap) to victory in the showpiece St James's Palace Stakes ahead of the third-placed Frankie Dettori-trained favorite Too Darn Hot (in pink, center).
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The Royal Enclosure is the high-society place to be seen at Ascot.
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James Doyle rode Blue Point (blue) to win the Group 1 King's Stand Stakes.
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Punters can bet on the color of the Queen's hat every day.
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Attendees dress up for the occasion.
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Members of the band 'The Tootsie Rollers' pose ahead of day on at Royal AScot.