Inga Ibsdotter Lilleaas (born 9 April 1989) is a Norwegian actress. She studied theatre at Nord University in Bodø and spent a semester studying at the Lee Strasberg Theatre and Film Institute in New York City. She is most notably known for her role in Joachim Trier's 2025 film, Sentimental Value.

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Inga Ibsdotter Lilleaas is a Norwegian actress who trained at Nord University and the Lee Strasberg Theatre and Film Institute, recognized for her versatility across independent and mainstream Nordic cinema.
She is recognized for her performance as Agnes in the 2025 Joachim Trier film Sentimental Value, as well as her roles in the historical drama The Last King and the war drama Betrayed.