The game has been designated for a 7 p.m. kickoff Sept. 9, and will air nationally on the Big Ten Network, the network announced Wednesday.
Ten of WKU’s regular-season games now have assigned kickoff times, with only road trips to UTEP and Vanderbilt still to be announced.
The Hilltoppers traveled to play the Illini in 2014 but fell 42-34 in a game where quarterback Brandon Doughty threw for 297 yards on 28-of-48 passing with two touchdowns.
Defensive back Wonderful Terry had a 95-yard strip-and-score fumble return, and a Garrett Schwettman field goal put the Hilltoppers up 27-21 late in the third quarter.