Danish actress who, with her frequent stage partner, the character actor Poul Reumert (Reumert, Poul), reilluminated the dramas of Henrik Ibsen and August Strindberg.

Ipsen first appeared on the stage at the Royal Theatre, Copenhagen, in 1909. She showed wide versatility, achieving success in roles both comic (Rosalind in As You Like It) and serious (Nora in A Doll's House), although her mature career emphasized dramatic portrayals. Her Lady Macbeth achieved special distinction; her Ibsen principals, such as Mrs. Alving (Ghosts), garnered great acclaim, and her Strindberg heroines, such as the title role in Miss Julie and Alice in Dance of Death, brought her wide repute. In the latter roles Ipsen was complemented by the celebrated actor Reumert, whose dramatic career paralleled her own.

Ipsen appeared in Danish films as early as 1913; her best-known performances in silent films were in the Dickens classics David Copperfield (1922) and Little Dorrit (1924); later, she received particular acclaim in Go Home With Me (1941). Two films codirected with Lau Lauritzen, Jr., are among Ipsen's best-known works—Afsporet (1942) and Red Meadows (1945).