Poppy Seed Chicken Casserole

1lb chicken, cooked
1 can cream of chicken soup
1 cup sour cream
2 cups rice, prepared
1 stack or Ritz cracker crumbs (or other butter-cracker)
2 tbsp poppy seeds
1 stick melted butter

Grease a 9X13 pan. Cut chicken into bite size chunks. In separate bowl mix together the soup and sour cream. Melt cute of butter in microwave. Once melted mix it with the crushed Ritz cracker crumbs and poppy seeds.
Layer this way in pan. Rice, Chicken, pour soup/sour cream mix evening over and top with a layer of cracker/poppy seed mixture. Bake at 350 degrees for 30 minutes.