The Owls will travel up the road to play the league 2 outfit on the week commencing August 13.
It could be a potential banana skin for The Owls, who have not played The Millers since beating them on New Year's Day in 2003.
Rotherham will no doubt be up for the game and former Owls striker and Millers manager Mark Robins will make sure his team give their all in a bid to beat their fierce rivals.
Wednesdayites can also look forward to finding out 2007/08's league fixtures very soon as they are published tomorrow.