Abstract: An illuminated costume mask is provided. The costume mask comprises a face covering that is designed to cover a portion of the user's face. The mask comprises an upper and lower surface, upon one of which is disposed an electroluminescent device such that the mask is illuminated when the electroluminescent device is energized. The electroluminescent device comprises one of an elongated electroluminescent wire or an electroluminescent panel, whereby the wire embodiment is formed in a desired pattern along the upper or lower surfaces of the mask, and the panel embodiment is disposed along one of the upper or lower surfaces of the mask. Powering the device is a battery power source electrically coupled to the electroluminescent device. The power source is supported within a body-worn housing and is operably connected to the electroluminescent device, whereby the user can control the electroluminescent device using an activation switch or the electrical coupling.