Nominees will be announced on August 21.
Rivera, who plays Santana Lopez on Glee, wedded actor Ryan Dorsey.
Composer Scott Alan will accompany the "Unique" star.
Lynch will also be joined by Broadway veteran Cheyenne Jackson for the concerts.
A Broadway-themed concert will be held at the West Coast supper club Upstairs at Vitello's.
Glee stars Amber Riley and Jenna Ushkowitz will also appear in the August production.
Chenoweth is set to be inducted into the Hollywood Bowl Hall of Fame.
The actress talked about the potential revival on Bravo's Watch What Happens Live.
The celebration for Tom Kitt and Brian Yorkey's new musical boasted a guest list that included Darren Criss, Michael C. Hall, and Maura Tierney.