It's a big match for Huddersfield Town and Reading on Monday - whoever wins will get a spot in next season's Premier League.
Both teams are currently in the Championship but the play-off at Wembley Stadium will change that.
One of the teams will move up to the Premier League and get to play against the best teams in English football next season.
So, will Town be victorious? Or will Reading be celebrating promotion?
Let's hear what the fans think...