Grease a baking pan and preheat oven to 350 degrees.
Add peaches to the bottom of your pan.
Sprinkle your cake mix evenly on top.
Pour melted butter on top as evenly as possible and sprinkle with cinnamon.
Bake 35-40 minutes or until top is slightly browned.
Take out of the oven and let cool 5-10 minutes before serving.