He's following in the footsteps of chart-topping band Jon Bon Jovi, who'll take to the Slane stage on July 15.
The 8 Mile star -- who has sold 100 million records worldwide -- is now expected to confirm that he'll be performing there in the middle of August 2013 in what's expected to be one of the hottest gigs of the summer.
Slane Castle owner Lord Henry Mountcharles said: "In 2005 I said Eminem was a stunning artist. He is even more so today. I am thrilled he is going to play Slane."
Eminem has had plans to play here before -- in 2005 show he sold 80,000 tickets in one day alone as part of his Anger Management tour.
But shortly before the September 2005 gig, he sparked fury among his Irish fans when he cancelled the concert, citing "exhaustion".
His cancellation resulted in a court case which saw promoters MCD seeking over €1.5m from three UK insurance companies over their failure to reimburse the company.
The case was eventually settled for an undisclosed amount at the High Court in June 2007 -- and Eminem indicated he always intended to fulfil his promise of a gig at Slane.
Tickets for next year's show won't be cheap -- they're expected to cost between €70-€80.
This week saw Eminem, whose real name is Marshall Mathers, being announced as one of the headline acts at next summer's twinned festivals of Reading and Leeds.
Organisers have confirmed the star's return to the event after more than a decade, with further names to be added later.
Eminem last played Reading and Leeds in 2001 following the release of his first hit album The Marshall Mathers LP. That year, Marilyn Manson joined him on stage to sing their hit The Way I Am.
He's due to release his first album since Recovery in 2010 in a few months' time as he promotes fresh material with a Europe-wide tour.
Close friend 50 Cent has already revealed how he'll be collaborating with the star on a new album.