Chicken Spaghetti

3 C cooked chicken
1-12oz pkg thin Spaghetti
3 Tbsp butter or margarine
1/2 C chopped celery
1/2 C chopped onion
1-28oz Cream of Chicken soup
1 c milk
1 1/2 C Velveeta or like product
salt and pepper to taste

Boil chicken until cooked. SAVE WATER FOR SPAGHETTI!!! Chop the cooked chicken into bite size pieces.In another pan, melt butter and saute' celery and onion. Add chicken, soup, milk, velveeta, salt and pepper. Drain spaghetti and add to chicken mixture. Bake in a greased baking pan for 20 minutes at 350* or until bubbly.