Irene Ibsen Bille (10 September 1901 – 22 February 1985) (née Irene Ibsen) was a Norwegian novelist and playwright. She was born in Kristiania as a daughter of Prime Minister Sigurd Ibsen. She was a sister of Tancred Ibsen, paternal granddaughter of world-famous writer Henrik Ibsen and Suzannah Ibsen (née Thoresen), daughter of Bergliot Ibsen (née Bjørnson) and maternal granddaughter of Bjørnstjerne Bjørnson and Karoline Bjørnson (née Reimers).