St Patrick's Day festivities have begun in New York City as the parade made their way up Fifth Avenue. Both the New York Fire Department and NYPD joined in on the annual event.
Egypt's pyramids and sphinx have been illuminated in green light to mark St Patrick's Day tomorrow.
They are one of almost 70 famous landmarks around the world that are being lit up to celebrate Ireland's National Day, according to Tourism Ireland.
Other green landmarks include Sydney Opera House, the London Eye, Niagara Falls, the Leaning Tower of Pisa and Anfield Stadium in Liverpool.
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Government buildings, cathedrals and colleges have all been turned green as St Patrick's festival celebrations commence in Ireland.
The Duchess of Cambridge looked relaxed and happy as she smiled for the official photo with the 1st Battalion Irish Guards.
She beamed brightly as she was presented with a posy by five-year-old Isabella Stevenson, the daughter of the Regimental Sergeant Major.
As guest of honor for the St Patrick's Day parade, the Duchess of Cambridge enjoyed a relaxed visit to the Irish Guards in Aldershot.
Before heading off for a private luncheon with Officers Kate visited the the Junior Ranks Mess Hall where Guardsmen and Lance Corporals cheered and toasted her with cans of lager and small glasses of Irish sherry.
Conmael, the mascot of the Irish Guards, was given a special treat this morning when he was presented with a sprig of Shamrocks from the Duchess of Cambridge, the guest of honor at today's St Patrick's Day parade.
HRH The Duchess of Cambridge has arrived at Aldershot barracks to attend the St Patrick's Day Parade.
She was given a sprig of shamrocks to wear on her festive green coat before presenting officers with their sprigs.
This is her first solo military duty and follows a century-old tradition started by Queen Alexandra, the wife of the then King, Edward VII back in 1901.