The ongoing feud between the two spilled over onto the show last year when Damon took over Kimmel's show and tied the late night talk show host to a chair.
On Thursday night, Damon will return as a guest for the first time since that nasty fallout.
And already the two have been trading some nasty tweets ahead of his appearance.
The show airs Thursday at 11:35 p.m. right after ABC7 News at 11. Don't miss it!