Another quick reminder for you.

A win in Poland and a place in the finals is theirs.

A 2-2 draw - or higher, so 3-3 etc - and the Republic are there in place of Poland.

A 0-0 or 1-1 draw in Poland could be enough to qualify - but only if Georgia win in Germany.

Defeat in Poland and it's the play-offs for the Republic.

We've been asking you whether the Republic of Ireland will reach Euro 2016 and, if so, how?

You're a confident lot, with 44% saying they will do it via the play-offs, 38% saying they'll do it tonight and only 18% of the opinion that they won't make it.

Let's find out...

Under way! Shane Long charges down the kick-off. Defend from the front. 

Kevin Kilbane
BBC Radio 5 live at the National Stadium, Warsaw

"What an atmosphere, this is one of the best stadiums I've been to, without a doubt. I'm sure the Irish fans beyond the goal to our left will be making plenty of noise as well."

John O'Shea exchanges flags with Robert Lewandowski. It may be the closest he gets to him all night...

O'Shea wins the toss and turns Poland around. Good bit of early antagonism.

Image source, Reuters

Poland: Fabianski, Piszczek, Glik, Pazdan, Wawrzyniak, Linetty, Krychowiak, Olkowski, Maczynski, Grosicki, Lewandowski. Subs: Szczesny, Cionek, Jedrzejczyk, Szukala, Zielinski, Kapustka, Blaszczykowski, Peszko, Mila, Sobiech, Borysiuk, Boruc.

Rep of Ireland: Randolph, Coleman, O'Shea, Keogh, Brady, McClean, McCarthy, Whelan, Hendrick, Walters, Long. Subs: Forde, Wilson, McGeady, Keane, Meyler, Murphy, Christie, McShane, Gibson, Hoolahan, McGoldrick, Elliot.

Referee: Cuneyt Cakir (Turkey)

Here we go then, the players are out at the superb stadium in Warsaw. A great atmosphere building, which of these sides will secure a spot at next summer's finals tonight?Or will it be both? 

Image source, Reuters

As we focus on the culmination of Group D in Warsaw you can follow full commentary of Scotland's clash with Gibraltar in this page here.

So Albania and Romania are the two latest nations to book their place in next summer's European Championship after securing second place in their respective groups.

These are the 13 nations that have qualified along with hosts France so far.

England, Wales, Northern Ireland, Belgium, Italy, Spain, Switzerland, Portugal, Iceland, Czech Republic, Austria, Romania, Albania.

And tonight we'll find out which two out of Germany, Poland and Republic of Ireland will join them.

Kevin Kilbane
BBC Radio 5 live at the National Stadium, Warsaw

"Having Seamus Coleman back is really positive, I think he'd fit into pretty much any team in Europe. John O'Shea and Richard Keogh have played really well as a central defensive partnership, too. 

"And Darren Randolph, I'm sure the back four will have confidence in him, Martin O'Neill does. Before joining West Ham he'd been excellent over the last few seasons at Birmingham."

Image source, Reuters

Let's not forget that it is all to play for for Poland tonight as well.

They can secure automatic qualification with a win, while a 0-0 or 1-1 draw will also be enough.

Do they go for the win or play for a draw?

The Republic of Ireland can qualify automatically tonight with a win or a high-scoring draw. But if they don't they will be in the play-offs.

Who may they play?

There is still a lot to play for but it could be Sweden, Russia, Croatia, Denmark, the Netherlands, Ukraine...

Republic of Ireland manager Martin O'Neill: "The turnaround between games is very quick, we have had to travel here and there are one or two tired legs in there. 

"Wes Hoolahan is not fit enough to start but is available for the last half hour or so if we need him. He has been a fine player for us.

"We are in the play-offs already but this is the one here. We have given ourselves a chance and you don't want to die wondering. We have to win tonight and the players know it. They are ready."

Image source, Reuters

I can answer that one for you Tricky...

Tweet us using #bbcfootball, external or text on 81111 from UK mobiles - but don't forget to include your name.

The question we are asking this evening is: Will Republic of Ireland reach Euro 2016?

Vote at the top of the page if you are on mobile or on the right hand side for desktop users. The vote will close before kick-off and terms and conditions can be found here.

Image source, Getty Images

The Republic must find a way to contain free-scoring Bayern Munich forward Robert Lewandowski tonight, a task which boss Martin O'Neill concedes will be difficult.

Lewandowski has scored 14 goals in his last five games for club and country.

"Outside of the very, very best players in the world, Ronaldo and Messi, Lewandowski is in a bracket of a number of players who are not far behind. He's really brilliant," said the Republic manager.

"Someone like that, whom you can rely on, is going to cause you problems. You have to cope with that and try and come through."

Good luck Richard Keogh and John O'Shea...

Image source, Bundesliga

A place in the play-offs is assured for the Republic of Ireland tonight before kick-off.

So they can just go for the win or high scoring draw tonight. Will they go for all-out attack?

BBC Radio 5 Live