Peter Buckland’s side have already seen off Combined Counties outfits AFC Croydon Athletic and Erith Town in last month’s preliminary rounds, before shocking Ryman Premier League Burgess Hill Town 2-1 in the first qualifying round.
The hosts also are in the second qualifying round for the first time in six years and have never passed this stage in the clubs history.
For the Millers we have defeated FC Clacton 6-2, and followed that up with a scalp against Histon 5-1, in their own back yard.
Although being a step below, Horsham are no pushovers. They are undefeated this season from their 12 matches in all competitions. Wins in the FA Cup, FA Vase and Sussex Charity cup have helped with their momentum in the league table.
Justin Gardner commented "Horsham are flying at the moment and I hear they have a lot of players from the title winning team from Burgess Hill last season in the Ryman South. We know first hand how good they are from playing burgess hill last season. It'll be a tough match, and we have to be at our best to get through to the next round."
Saturday 3PM Kick Off
Horsham YMCA v Aveley FC