Preheat oven to 350 degrees F.
For the chicken mixture, combine mix chicken, onion and/or celery, and 1 cup cheese.
For the sauce, combine cream of chicken soups, green chiles, and sour cream.
Spread ½ of the sauce mixture in bottom of 9×13 pan. Divide the chicken mixture between the 8 tortillas. Roll each one and place in the pan on top of sauce mixture.
Cover rolled tortillas with remaining sauce mixture.
Bake for 30 minutes or until bubbly.
Sprinkle remaining cheese on top and bake for 5 more minutes.
Serve with rice or top with salsa, if desired.