Ilsa Lund is a fictional character from the classic film Casablanca, released in 1942. She is portrayed by actress Ingrid Bergman and is known for her complex emotional depth and strong presence. Ilsa is a former lover of the film's protagonist, Rick Blaine, played by Humphrey Bogart, and her return to his life in wartime Morocco creates tension and drama. In the story, Ilsa is married to Victor Laszlo, a resistance leader, which complicates her relationship with Rick. Her character embodies themes of love, sacrifice, and the moral dilemmas faced during World War II, making her a memorable figure in cinematic history.