Pre-heat the oven to 350°F.
Shred the cooked chicken with forks.
Spread the cream cheese on the bottom of an iron skillet (or deep dish pie plate, etc.).
In a separate mixing bowl, mix the BBQ sauce with the shredded chicken.
Spread the BBQ chicken mixture on top of the cream cheese.
Pour the Ranch dressing on top of the BBQ chicken mixture.
Sprinkle the entire skillet with grated Mozzarella cheese.
Bake for about 20 minutes at 350°F, or until the cheese melts and is bubbly.
Serve warm with tortilla chips, crackers, raw vegetables, or whatever snack food you prefer.