Easy Southern Chicken Casserole

2 cups cooked, deboned chicken
1 cup sour cream
1 can cream of mushroom soup
1 can cream of chicken soup
1 can cream of celery soup
1 roll Ritz crackers, crushed
1/2 cup margarine, melted

Place cooked chicken in a baking dish. Mix sour cream and soups. Pour over chicken. Mix cracker crumbs and melted margarine. Sprinkle on top of casserole. Bake in 350 degree oven for 25 minutes or until lightly browned.