The event at the Bridgestone Arena in Nashville is to air on ABC.
Other artists scheduled to make special appearances on the broadcast are Lindsay Ell, Vince Gill, Sierra Hull, Chris Janson, Ashley McBryde, David Lee Murphy, Jon Pardi, Carson Peters, Marty Stuart, and Cole Swindell.
Previously announced performers for the CMA Awards include Jason Aldean with Miranda Lambert, Kelsea Ballerini, Dierks Bentley with Brothers Osborne, Garth Brooks, Luke Bryan, Kenny Chesney, Luke Combs, Dan + Shay, Florida Georgia Line with Bebe Rexha, Midland, Kacey Musgraves, Old Dominion, Pistol Annies, Thomas Rhett, Carrie Underwood, Keith Urban and Brett Young.
Presenters will be announced next week, the Country Music Association said Friday.
Paisley and Underwood are to host the gala for the 11th consecutive year.
Not one, not two, but THREE amazing artists performing together at the #CMAawards! Don't miss @ChrisStapleton with @MarenMorris and @MavisStaples this Wednesday at 8|7c on @ABCNetwork. https://t.co/PymLma7xTd pic.twitter.com/q1H7W6mZnm— CMA Country Music (@CountryMusic) November 9, 2018