Famous for guarding royal palaces in London in their bearskin hats, they kicked off their visit with an incredible musical parade through Carrickfergus, followed by a spectacular performance beside Carrickfergus Castle.
Other events are:
A remembrance event, at Belfast City Hall Cenotaph, 10.30am tomorrow (Friday);
Beating the retreat at Edenmore Golf and Country Club, Moira, 7pm tomorrow;
A parade through Bangor at 3pm on Saturday from Castle Park Road, with some 300 personnel, followed by a static concert at the town hall at 4pm;
And the laying up of old colours at an invitation-only 3pm service on Sunday at St Mark's Parish Church, east Belfast.
A parade preceding the service starts at Campbell College at 2pm and proceeds along the Belmont and Holywood Roads to St Mark's Church, and at 4.20pm the parade will leave the church and conclude at Ashfield School on the Holywood Road.
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The soldiers performed against the spectacular backdrop of the historic Carrickfergus Castle Photo: Arthur Allison/Pacemaker Press
2.
The Irish Guards' 125th anniversary celebrations awe Carrickfergus Photo: Arthur Allison/Pacemaker Press
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The streets of the town came alive to the sounds and skill of the Irish Guards Regimental Band and Pipe Band Photo: Arthur Allison/Pacemaker Press
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The regiment was formed by order of Queen Victoria in 1900 Photo: Arthur Allison/Pacemaker Press