Cook the Pasta: In a large pot, boil salted water and cook the fettuccine according to package instructions. Drain and set aside.

Cook the Chicken: In a large skillet, heat olive oil over medium heat. Add diced chicken, season with salt and pepper, and cook until golden brown and cooked through (about 6-8 minutes). Remove chicken from the skillet and set aside.

Cook the Shrimp: In the same skillet, add minced garlic and sauté for 1 minute. Add shrimp and cook until pink and opaque (about 3-4 minutes). Remove shrimp and set aside with the chicken.

Make the Alfredo Sauce: Pour heavy cream into the skillet and bring to a gentle simmer. Stir in grated Parmesan cheese and cook until melted and smooth. Season with salt and pepper to taste.

Combine Everything: Add the cooked pasta, chicken, and shrimp to the skillet. Toss everything together until well combined and heated through.

Serve: Garnish with fresh parsley and enjoy your delicious Chicken and Shrimp Alfredo!