Brad Pitt, Ben Stiller, Christina Applegate, the first "American Idol" winner Kelly Clarkson, Melissa Etheridge, Laura Dern, Gene Simmons from KISS, Fred Willard, Jamie Kennedy and the band Sum 41 and
are among some of the guest voices this season on the Emmy Award-winning animated series King of the Hill (Sundays 7:30-8:00 PM ET/PT) on Fox. Additionally, country music stars Trace Adkins, Brad
Paisley, George Strait, Deanna Carter and Travis Tritt will all appear in a special country-themed Christmas episode. These celebrities will join the ranks of past guest voices that include Jennifer
Aniston, Renee Zellweger, Meryl Streep, Chris Rock, Matthew McConaughey, Sarah Michelle Gellar, Reese Witherspoon, Lisa Kudrow, Heather Locklear, Snoop Dogg, the Dixie Chicks, Pamela Anderson and Kid
Rock. King of the Hill depicts the life and times of Hank Hill, his family and their neighbors in the fictional suburb of Arlen, Texas, in the heartland of America. The series recently celebrated its
150th episode and has received numerous accolades throughout the past seven seasons, including an Emmy Award for Outstanding Animated Program and an Emmy Award for Outstanding Voice-over Performance
(Pamela S. Adlon); an Annie Award and an Environmental Media Award; and a Nancy Susan Reynolds Award.