Heat olive oil in a large skillet over medium heat. Add chicken, season with salt and pepper, and cook until no longer pink, about 5-6 minutes.
Add marinara sauce and Italian seasoning to the skillet. Stir to combine and let simmer for 3-4 minutes.
Pour in heavy cream and add Parmesan cheese. Stir until the sauce is creamy and well combined.
Add cooked rigatoni pasta to the skillet, stirring to coat pasta with sauce evenly.
Top with shredded mozzarella cheese, cover, and cook until cheese is melted, about 2 minutes.
Garnish with fresh basil before serving.