Preheat oven to 350 degrees. Spray casserole pan with Pam.
Heat sour cream, cream soups, and butter in pan until melted and bubbly.
Add shredded chicken and noodles and stir. Pour ingredients into a 9X13 prepared pan.
Top with grated cheese. Bake at 350 degrees for 30-35 minutes. Mixture should be bubbly around edges.