The original design for the Agility ankle was developed and patented in the late 1970s. DePuy Orthopaedics began manufacturing the implant as the Agility Ankle System. Currently in the United States, the Agility is the most widely used ankle prosthesis. With more than 20 years of experience, the Agility Ankle System has the longest follow-up of any fixed-bearing device. Since its introduction, the Agility Ankle System has gone through several design modifications. This article briefly reviews the history of the Agility Total Ankle System and illustrates each of the modifications made with the LP implant.