In a small bowl, add cake mix and melted butter. Stir to combine until it starts to clump up some. You want to leave some larger clumps (about the size of a marble).
Pour cherry pie filling into the baking dish and spread out evenly.
Sprinkle cake and butter mixture evenly over top of pie filling.
Place in oven and bake for 30 minutes. Top should be golden brown. Let cool at least 5 minutes before serving.
Leftovers can be kept, covered, in refrigerator for up to 3 days.