Brittany Anne Murphy-Monjack (November 10, 1977 – December 20, 2009) was a voice actress on King of the Hill. She provided the voices of Luanne Platter and, prior to "I Don't Want to Wait," Joseph Gribble.
On December 20, 2009, Murphy died of pneumonia and anaemia at the age of 32.
- Both she and Reese Witherspoon previously collaborated in the 1996 exploitation movie Freeway before they voiced in Hanky Panky and High Anxiety.
- In 2005, Murphy won an Annie Award (Voice Acting in an Animated Television Production) for voicing Luanne in the episode "Girl, You'll Be a Giant Soon".