Hayes character will be introduced during the Season Two premiere of "The Millers," which airs Oct. 30 at 8:30 PM.
"After years of being a fan and hearing from others how wonderful he is to work with, I couldn't be more excited about Sean Hayes joining 'The Millers,'" said Greg Garcia, series creator and executive producer, in a statement. "The thought of he and Margo Martindale as BFFs makes me smile every time I think about it. We're only just getting started, and writing this season's stories has been a blast."
"The Millers" also stars Beau Bridges, Jayma Mays, JB Smoove, Nelson Franklin and Lulu Wilson.