Preheat your oven to 425°F (220°C).
Roll out the pizza dough on a floured surface to your desired thickness.
Transfer the dough to a pizza stone or baking sheet.
Spread ranch dressing evenly over the dough.
Layer diced chicken over the ranch dressing.
Sprinkle crumbled bacon on top of the chicken.
Add shredded mozzarella and cheddar cheese generously.
Season with salt and pepper to taste.
Bake in the preheated oven for 15-20 minutes or until the crust is golden brown.
Remove from the oven and garnish with sliced green onions.