the present invention relates to a method of manufacturing an interior trim panel assembly having integrated trim panel components . the method of manufacture includes providing a die including a pair of die halves cooperating to define a mold cavity to form a interior trim panel where at least one of said die halves includes a surface defining an a - surface and the mold cavity includes a plurality of recesses . the method further includes placing a trim panel component into a recess and closing the die halves to form a rigid substrate within the mold cavity by injecting a molten thermoplastic material into the mold cavity mold cavity . the method further includes bonding the molten thermoplastic material to a trim panel component within the mold cavity while the rigid substrate is formed .