Stephen Root is the voice-actor who voices Mildew.
Stephen Root was born in Florida, but frequently moved around the country due to his father's job as a manager on construction projects. He attended University of Florida and did a three year stint around the US with the National Shakespeare Company. Stephen Root won a Gold Derby Award in 2008 for "Ensemble Cast" in No Country for Old Men.
- Crocodile Dundee II (1988) - DEA Agent
- Star Trek: The Next Generation (1991) - Captain K'Vada
- Buffy the Vampire Slayer (1992) - Gary Murray
- Office Space (1999) - Milton Waddams
- Finding Nemo (2003) - Bubbles
- Leatherheads (2008) - Suds
- Adventure Time (2011-2017) - The Royal Tart Toter, Grimby, Martin