Preheat oven to 350°F and spray a 9x13-inch baking dish with nonstick cooking spray.
In medium bowl, mix sour cream, ranch dressing mix, garlic, pepper, Alfredo sauce and 1 cup mozzarella cheese.
Gently combine the chicken and penne with the sauce. Pour mixture into pan.
Sprinkle the remaining cheese along with the bacon pieces evenly over the noodle mixture.
Cover with nonstick aluminum foil and bake in oven for 20 minutes until bubbly and cheese is melted.
Sprinkle top with parsley and serve!
