Nikolaj Lie Kaas (Danish: [ˈne̝koˌlɑjˀ ˈliˀ ˈkʰɔˀs]; born 22 May 1973) is a Danish actor whose career rose in the 1990s. Kaas graduated from the National Theater School in Denmark in 1998. He first appeared on screen in Søren Kragh-Jacobsen's film The Boys from St. Petri in 1991 as Otto, the rebel son of a traitor.
He has hosted the Zulu Comedy Galla on Danish TV three times (2009, 2011, 2012).
He is the son of actor Preben Kaas and actress/writer Anne Mari Lie. The couple have two daughters. Their daughter Gerda Lie Kaas starred in the lead role of Clara for the Danish juvenile fantasy film, Wild Witch (2018).
In 2002 and 2012, he won the Robert Award for Best Actor in a Leading Role.
In 2012, he received the Lauritzen Award.
In 2003, he was named as one of the European films "Shooting Stars" by European Film Promotion.