In a large bowl, combine soup, milk, and cheese. Add chicken, macaroni, and eggs. Stir in 1/4 cup melted butter.
Transfer to a greased 13- by 9- by 2-inch baking dish. Cover and refrigerate for eight hours or overnight.
Before baking, toss the bread crumbs with remaining butter; sprinkle over casserole. Bake, uncovered, at 350°F. for 60 to 65 minutes, or until bubbly and golden brown. Makes 12 servings.