Theodore Peter James Kinnaird Taptiklis (born 16 December 1984) is an English actor and producer. He gained recognition for playing Tobias Eaton in The Divergent Series (2014–2016). He has starred in the horror films Underworld: Awakening (2012) and Underworld: Blood Wars (2016), the science fiction film Archive (2020), and the dark comedy The Monkey (2025) in a dual role as a pair of twin brothers.