Theodore Peter James Kinnaird Taptiklis (born 16 April 1985), known professionally as Theo James, is an English actor. He gained recognition for playing Tobias Eaton in The Divergent Series film trilogy (2014–2016). He has starred in the horror films Underworld: Awakening (2012) and Underworld: Blood Wars (2016) and the science fiction film Archive (2020). In television, he appeared in the crime drama series Golden Boy (2012), the romance series The Time Traveler's Wife (2022), and the dark comedy series The White Lotus (2022), which earned him a nomination for a Primetime Emmy Award.

Early life
Theodore Peter James Kinnaird Taptiklis was born in High Wycombe on 16 April 1985. He is the son of Philip Taptiklis, a business consultant, and Jane (née Martin), who worked for the National Health Service. He is of Greek and Scottish descent. He has two older brothers and two older sisters.

James was raised in Askett. He attended Aylesbury Grammar School and went on to earn his undergraduate degree in philosophy from the University of Nottingham. He trained at the Bristol Old Vic Theatre School.