Preheat your oven to 375°F (190°C).
In a large skillet, heat olive oil over medium heat.
Add the cooked chicken and season with garlic powder, Italian seasoning, salt, and pepper.
Stir in the marinara sauce and heavy cream, letting it simmer for 5 minutes.
Combine the cooked pasta with the chicken mixture in a baking dish.
Top with mozzarella and cheddar cheese.
Bake for 20-25 minutes, or until the cheese is bubbly and golden.
Serve hot and enjoy!