Which King of the Hill character had been voiced by Brittany Murphy before the revival?

Brittany Murphy had voiced Luanne Platter before the King of the Hill revival.

Luanne is Peggy Hill’s niece and Hank Hill’s niece by marriage. She lives with the Hills for much of the original series and develops from an insecure young woman into a more independent adult. Her storylines often combine family comedy with questions about work, romance, education, and self-confidence.

Murphy provided Luanne’s voice throughout the original run, making the character one of her best-known television roles. Murphy died in 2009, so Luanne does not play a regular speaking role in season 14; the revival instead preserves her presence through references and imagery. Connie, Minh, and Nancy are also established characters, but Murphy’s signature King of the Hill role was Luanne.