Dagur Kári (born Dagur Kári Pétursson; 12 December 1973; Paris) is an Icelandic film director. He was born in Paris, France, to Icelandic parents.

The family returned to Iceland when he was 3 years old. After attending local schools as a child, Kári went to Denmark for college. He graduated from the National Film School of Denmark in 1999, having created the art house short movie Lost Weekend.