Thousands of revellers are flocking to parades and donning eye-catching ensembles to celebrate the Irish national holiday
Revellers prepare for the St Patrick's Day Parade in Dublin
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A sea of green made up of half a million people is set to descend on the Irish capital
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Credit: Clodagh Kilcoyne/Reuters
The Princess of Wales presents a traditional sprig of shamrock to the mascot of the Irish Guards, a two-year-old Irish wolfhound named Seamus
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Credit: Karwai Tang
William and Kate share a laugh at the Irish Guards' St Patrick's Day parade at Mons Barracks in Aldershot
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Young revellers even sport green rain covers to get in the spirit of the festivities
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A racegoer at Cheltenham Festival is a vision in green
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The Dublin parade will start at Parnell Square and snake its way through some of the city's most popular streets
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Credit: Brian Lawless/PA
The Irish Guards' mascot, Turlough Mor, also known as Seamus
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Revellers don alien costumes in an interesting interpretation of the theme
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Credit: Clodagh Kilcoyne/Reuters
Performers take part in the Dublin parade
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Credit: Clodagh Kilcoyne/Reuters