Harington was born in Acton, Greater London. His name originally comes from the 16th-century poet known as Christopher Marlowe. However, over time he has preferred to be called 'Kit' rather than Christopher.
Harington’s official debut as an actor came through a west end play in London called War Horse. This was during his time studying at the Royal Central School of Speech and Drama, where he graduated in 2008. Harington’s career has enabled him to expand his acting into different platforms, featuring in the popular computer game, Call of Duty: Infinity warfare. Harington voiced the character, Salen Kotch.
The role of Jon Snow in Game of Thrones gave Harington the opportunity to attain worldwide acknowledgement. Attaining a range of awards for multiple nominations, particularly around the best supporting actor.