Brittany Anne Murphy-Monjack (November 10, 1977 – December 20, 2009) was a voice actress on King of the Hill portraying Luanne Platter and Joseph Gribble before he went through puberty.
- 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".
- On December 20, 2009, Murphy died of pneumonia and anaemia at the age of 32. Her death came roughly three months after the conclusion of ''King of the Hill ''on FOX.