Thousands of people thronged the streets of Dublin for the annual St Patrick's Day parade.
A street performer leaps for the crowd in front of Christ Church in Dublin.
Was there method in the madness of this Robert De Niro-style St Patrick in Dublin?
In England, the 1st Battalion Irish Guards marched in a St Patrick"s Day parade held at the Victoria Barracks in Windsor.
In Auckland, New Zealand, these drinkers got into the festive spirit.
In New York, these competitive eaters skipped the traditional pints of stout for corned beef and rye sandwiches. Winner Pat Bertoletti (left) consumed 16 3/4 sandwiches in ten minutes to win the contest.
The fountain in front of the White House flowed with green water to mark the day.
Taoiseach Brian Cowen handed US President Barack Obama a bowl of shamrock during a ceremony at the White House.
President Obama also met Northern Ireland first and deputy first ministers Peter Robinson and Martin McGuinness.