"I think this man will honestly make a conscientious effort to serve the people who put him in office," Ditka said. The two teamed up for a fundraiser Friday night at Harry Carray's.
McMichael was a member of the 1985 Super Bowl Champion Bears.
McMichael is running against incumbent John Noak, who says the endorsement from Ditka is "no surprise."
The election is April 9.