With the Rugby World Cup closing in at a rate of knots, we're delighted to preview the tournament on Off The Ball tonight with none other than Ronan O'Gara.

The Ireland legend will be joining us at Cork's Opera House for tonight's Roadshow. And you can send in your questions for him and our panel of guests on Twitter with the #otbcork hashtag - before and all the way through the show which kicks off at 7pm sharp.

And as if you needed a reminder, here are five moments when ROG made a difference for Ireland.

Winning drop goal v Argentina 

With Ireland trailing Argentina 19-18 in a 2004 test match, it was O'Gara who stepped up at the death with the winning drop goal:

First try at Croke Park

Ireland might have lost to France in 2007 but it was O'Gara who scored the first international try in Croke Park during that match:

Late try v Italy 

That same campaign, O'Gara did end up on the winning side against the Italians in a World Cup warm-up as his controversial late try salvaged a narrow 23-20 victory:

That drop goal against Wales

This one needs little introduction other than the words 2009 and Grand Slam:

Another crucial drop goal 

Two years after his heroics against the Welsh, he delivered another match-winning drop goal to prevent a first ever Six Nations defeat to Italy:

Ireland's Ronan O'Gara kicks the winning drop goal ©INPHO/James Crombie