Age estimation in the living is a growing issue in the modern world. This chapter discusses the state of research in relation to methods which are utilized to undertaken age estimation in the living. Methods rely on changes that are observed as an individual moves from childhood through to maturity and include examination of soft tissue changes and maturational changes to the skeleton and dentition. The strengths and weaknesses of these methods are presented, as well as an exploration of new areas for research which are being undertaken.