Preheat oven to 350 degrees F (175 degrees C). Grease a 2 quart baking dish.
Layer potato slices in prepared baking dish. Pour cream over potatoes; sprinkle with Parmesan cheese. Season potatoes with salt and pepper.
Bake in preheated oven until potatoes are soft, about 1 hour. Remove from oven; gently stir potatoes. Sprinkle with the Cheddar cheese; cover and let rest until cheese is melted, about 5 minutes.