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Cook the pasta according to instructions on box.
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Preheat oven to 350°.
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Coat at 13 x 9" pan with nonstick spray.
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In a medium bowl, combine the chicken and Buffalo sauce and set aside.
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In a large bowl combine 1 jar of Alfredo sauce, 1/2 of the cheese, and the cooked pasta.
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Spoon half of the pasta mixture into the prepared pan.
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Next, top the pasta with the chicken mixture.
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Cover the chicken with the rest of the pasta mixture.
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Pour 8 ounces of Alfredo sauce over the top of the pasta.
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Sprinkle the remaining cheese over the top.
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Spray a piece of aluminum foil with nonstick spray and then cover the casserole with it.
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Bake covered for 30 minutes.
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Remove the foil and bake another 8-10 minutes, until cheese bubbles.
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Remove from oven and let casserole rest at least 5 minutes before serving.