A wall panel system includes at least one wall panel, each edge of the panel having a flange. At least one flange, and preferably two opposing flanges, have at least one slot therein. Each slot is mated with a clip having a unique shape that allows the clip to be inserted into the slot and secured therein without the use of fasteners and strictly due to its shape. The clip may then be attached to a building surface or intermediary mounting apparatus by a fastener to secure the wall panel thereto.