The episode featuring the professional dancer and interviewer will air April 25.
"During their 'first wedding dance' class, expert dancer Casey realizes that Mia has two left feet on her. He purposely tanks his moves so he can let his bride-to-be look better, and asks Phillip, the dance instructor to keep his secret," the network said in a news release Monday.
"Also, Ben runs into the legendary Larry King at his hotel and asks him for advice on how to handle a spat he had with Maddie about Vicky and Joel -- but plays down what he really said about them."
The show stars JoAnna Garcia Swisher as Mia, Jennifer Finnigan as Maddie, Josh Cooke as Ben, Jake Lacy as Casey, with Kurt Fuller as Joel and Debra Jo Rupp as Vicky.