Jai Stephen Courtney (born March 15, 1986) is an Australian actor. He started his career with small roles in films and television series before being cast as Charlie in the action film Jack Reacher (2012). He has gone on to star in A Good Day to Die Hard (2013), I, Frankenstein (2014), and The Exception (2016). He has also played Kyle Reese in Terminator Genisys (2015) and supervillain Captain Boomerang in the DC Extended Universe (DCEU) films Suicide Squad (2016), The Suicide Squad (2021), and The Flash (2023).

2019