buffalo chicken dip recipe easy

2 cups shredded cooked chicken (you can use rotisserie chicken for convenience) - 8 ounces cream cheese, softened - 1/2 cup buffalo wing sauce - 1/2 cup ranch dressing (or blue cheese dressing, if preferred) - 1 cup shredded cheddar cheese - 1/2 cup shredded mozzarella cheese - Optional: sliced green onions or chopped fresh parsley for garnish