Theodore Peter J. K. Taptiklis was born in Oxford, Oxfordshir 16 December 1984 (29 y/o) in the family of Jane Martin and Philip Taptiklis. He is the youngest of five children. He is the only actor in the family. His ancestry includes Scottish, New Zealander and Greek. He attended Aylesbury Grammar School and went on to earn his undergraduate degree in philosophy from the University of Nottingham.
Theo made his television debut in A Passionate Woman. He plays the title roles in Golden boy and Bedlam. He has been announced as the mysterious Four in Divergent based on the trilogy by Veronica Roth.
Outside his acting career, Theo is a singer and guitarist with the London-based band Shere Khan.