Kick off is at 7:45pm and the match is live on Sky for those who want to watch.
The return leg is at The Liberty Stadium next Monday, May 16th. Also a 7:45pm kick and live on Sky.
Here's what the managers had to say ahead of the match tonight.
Billy Davies:
"My motivation - the reason I joined this club, this sleeping giant - is that Forest, clearly, belong in the Premier League.
"When I spoke to the chairman (Nigel Doughty) about taking this job, we agreed that, over a three-and-a-half-year period, our joint challenge would be to get this club into the Premier League.
"That is why I came here. I looked forward to that challenge.
"I have said before that I want to manage at the highest level again. I would be delighted to take this club there, there is no doubt about it.
"I am ambitious and I am driven by the desire to compete at the top, and the current group of players we have here are very similar.
"Having avoided relegation two seasons ago and having got so close to things last season in the play-offs, it is time for this group of players to come of age.
"Quite simply it is time for them to go and get themselves to the final and then into the Premier League. It is time for that to happen."
Brendan Rodgers:
"I think if you have watched us for the majority of the season, you will see our qualities. And you know we can hurt any team.
"In the big games, nine times out of 10, they (his players) have performed.
"So I suppose we've got the ingredients to do it. I've always said I believed in the team; whether we do it or not is a different matter.
"But we'll go in and certainly enjoy it where we can and go and embrace those two fantastic games.
"But, like I say, our focus is on the first game to do a good job."
He added: "It will be a tough game.
"Forest are a good side, they retained a lot of the players who went close last season and they'll be motivated to ensure that doesn't happen again.