Kjetil Aleksander Lie (born 18 November 1980 in Porsgrunn) is a Norwegian chess player, and Norway's eighth International Grandmaster (GM).

Representing the chess club in Porsgrunn, Lie is the first Norwegian GM not from the Oslo vicinity.

Even after these norms, Lie had still not achieved the required Elo rating of 2500 until he won the first two rounds in a local tournament in Porsgrunn at the end of February 2005.

During the 2007 candidates matches in Elista, Lie served as Magnus Carlsen's second, helping with analysis and preparations.

[3] Lie secured his first Norwegian chess championship in Bergen 2009 with 6.5/9 points,[4] despite an upset loss to Lasse Løvik in the first round.