Preheat the oven to 350℉/177℃. Heat olive oil in a large dutch oven skillet over medium-high.
Mix paprika, garlic powder, onion powder, salt, and pepper thoroughly in a small mixing bowl.
Sprinkle paprika seasoning mixture over chicken thighs, ensuring the seasonings cover all sides.
Place chicken in the heated skillet skin side down and sear for 3-4 minutes or until a golden brown crust forms. Flip the chicken and continue searing for an additional 3 minutes. Remove chicken from the skillet, place on a plate, and set aside. The chicken will finish cooking in the oven.
With the heat still at medium-high, add onion, celery, minced garlic, and thyme. Cook, stirring frequently, for 3-5 minutes until onions are translucent. Turn off the heat and set the onion-celery mixture aside.
Grease a 9x13-inch baking dish with oil or cooking spray.
Add rice, cream of mushroom soup, Italian seasoning, melted butter, broth, heavy cream, parmesan cheese, onion-celery mixture, salt, and pepper to the baking dish and mix thoroughly.
Next, place chicken thighs skin side up on top of the rice mixture.
Add rice, cream of mushroom soup, Italian seasoning, melted butter, broth, heavy cream, parmesan cheese, onion-celery mixture, salt, and pepper to the baking dish and mix thoroughly.
Next, place chicken thighs skin side up on top of the rice mixture.
Cover the baking pan with aluminum foil and bake in a preheated oven for 60-70 minutes or until rice is tender and chicken cooked.
Once the rice is done, take off the aluminum foil, turn the oven to broil, and broil the casserole for 2-3 minutes to crisp up the chicken top to a golden brown.
Take the chicken and rice casserole out of the oven, garnish with fresh parsley, serve, and enjoy!