Around 100,000 people are expected to attend.
Large crowds are expected at the National Novena to Our Lady of Knock which kicks off later this today.
It's expected around 100,000 people will attend this year's event.
The daily ceremony will get underway at 3 o'clock this afternoon.
Rector of Knock Shrine Fr. Richard Gibbons, says the priest on the ground during last year's tragedy at Creeslough, will be speaking at the event:
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