Firmly press the Oreo crust mixture into an ungreased 9-inch pie plate, on the bottom and up the sides. Place the pie plate in the freezer for 20 minutes.
Right before serving, remove the pie from the fridge and sprinkle the Oreo cookie crumbs over top to create the 'dirt', and then place the gummy worms on top of the dirt or gently stick some worms into the dirt.