Cook Pasta: Boil pasta in salted water according to package directions. Drain and set aside.
Cook Chicken: Season chicken with salt, pepper, and paprika. In a large skillet, cook over medium heat until golden and fully cooked. Remove from skillet and set aside.
Make Sauce: In the same skillet, melt butter and whisk in flour to form a roux. Slowly pour in milk while whisking to create a smooth sauce.
Add Cheese: Stir in cheddar and mozzarella cheese until melted and creamy.
Combine: Add cooked pasta and chicken to the skillet. Toss well until fully coated in the cheese sauce.
Serve: Garnish with parsley and enjoy hot!