Bring a large pot of salted water to a boil. Add the fettuccine and cook according to package instructions until al dente. Drain and set aside.
In a large skillet, heat the olive oil over medium heat. Add the sliced chicken and season with salt, pepper, and Italian seasoning. Sauté until the chicken is cooked through and golden brown, about 5-7 minutes. Remove the chicken from the skillet and set it aside.
In the same skillet, reduce the heat to low and add minced garlic. Sauté for about 30 seconds until fragrant, being careful not to burn it.
Pour in the heavy cream and bring it to a gentle simmer. Stir in the grated Parmesan cheese until it melts and the sauce is creamy and smooth.
Add the cooked fettuccine and the chicken back into the skillet, tossing everything to coat the pasta with the Alfredo sauce. Cook for 2-3 minutes until heated through. Adjust seasoning with more salt and pepper if needed.
Serve hot, garnished with freshly chopped parsley for an added pop of color and flavor.