Which actress played Ilsa Lund in the 1942 film Casablanca?

In the 1942 film Casablanca, Ingrid Bergman played Ilsa Lund.

Ilsa is the former love of Rick Blaine, an American expatriate portrayed by Humphrey Bogart. When she arrives in Casablanca with her husband, Czech resistance leader Victor Laszlo, Rick must confront the unresolved relationship they left behind in Paris. Bergman’s performance gives Ilsa a mixture of romantic feeling, moral conflict, and wartime responsibility.

Casablanca was directed by Michael Curtiz and adapted from the unproduced stage play Everybody Comes to Rick’s. The film premiered in New York on November 26, 1942, while World War II was still underway. Its wartime setting and story of refugees, resistance, and sacrifice helped make it one of Hollywood’s most enduring dramas.

The role is sometimes confused with parts played by other major actresses of the era, including Ava Gardner, Rita Hayworth, and Lauren Bacall. None of those actresses played Ilsa. Bergman later said that Casablanca was not her favorite performance, yet the character became one of her most famous screen roles. The film won three Academy Awards, including Best Picture, at the 1944 ceremony.