Preheat the oven to 350 and lightly butter a 13×9 baking pan.
Spread the blueberry pie filling evenly across the bottom of your prepared baking dish.
Spread the fresh blueberries evenly across the pie filling and gently pat them down.
Sprinkle the dry cake mix across the top of the fresh berries smoothing it out as best as possible.
Pour the melted butter across the top of the cake mix, it is ok if there are some spots of dry cake mix.
Place the cobbler in the oven and bake for 40-45 minutes or until the top is golden brown.
Allow the cobbler to cool slightly before serving. Serve plain or with a scoop of ice cream or whipped cream.