Declan Kidney's men have five matches scheduled for the coming weeks, including Tests against Scotland, France and England. Game-time is vital for the players with the tournament just 34 days away.
Their run of warm-up fixtures begins at Murrayfield today where they meet Scotland for the second time in little over five months.
Ireland's last visit in the Six Nations saw them post a 21-18 win, outscoring the Scots by three tries to none - Jamie Heaslip, Eoin Reddan and Ronan O'Gara all touched down.
Versatile Connacht forward Mike McCarthy will make his senior debut for Ireland today, and exciting Munster back Felix Jones is standing by to do likewise as a replacement.
New combinations are being tried out, and many eyes will be on Rob Kearney and Jerry Flannery who are returning from their respective long-term knee and calf injuries.
Looking forward to this first match, head coach Kidney said: "It's great. You feel a bit more like a coach now really and the players are very keen.
"You have the jitters again going into a game and we'll see how much it comes together."
We will have live text commentary of the Celtic clash direct from the stadium. Plug in the laptop or turn on the PC and enjoy a flavour of today's match live on IrishRugby.ie with thanks to O2 - sponsors of MatchDay Live.
There will be full live text and score updates throughout the coverage as Ireland look to build momentum towards the World Cup in New Zealand.
We provide links to the live radio commentary from RTÉ Radio 1 and the TV coverage on BBC Two Television.
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