The four Republicans running for Illinois governor are set to face off in the final televised debate ahead of next week's primary election.
Thursday's forum is hosted by Chicago's WTTW-TV.
Those expected to attend are Treasurer Dan Rutherford, businessman Bruce Rauner and state Sens. Bill Brady and Kirk Dillard.
GOP candidates have participated in numerous debates statewide. Among them was a forum co-sponsored by NBC Chicago and the University of Chiacgo on March 4.
The primary election takes place on Tuesday. Early voting runs through Saturday.
Gov. Pat Quinn is seeking re-election and faces one primary challenger, activist Tio Hardiman. Quinn's campaign has said the Chicago Democrat won't participate in any debates ahead of the primary.