As part of forehead rejuvenation and surgical treatment of migraine headaches, the mass of the corrugator supercilii, the procerus, and the depressor supercilii muscles is replaced with fat for optimal aesthetic contouring of this region and to help prevent recurrence of the glabellar lines. The authors propose a new fat graft donor site that is convenient and safe and that adds only minutes to the total operating time. This fat is located between the deep layer of deep temporal fascia and the temporalis muscle as it approaches the zygomatic arch. The temporal musculofascial anatomy as it relates to the available fat donor sites is described. This source has been used on 74 occasions at 128 sites, from July 1, 2002, to December 31, 2002, with no complications attributable to the technique.