Lady Macbeth is a powerful presence in the play, most notably in the first two acts. Following the murder of King Duncan, however, her role in the plot diminishes. She becomes an uninvolved spectator to Macbeth's plotting, and a nervous hostess at a banquet dominated by her husband's hallucinations. Her fifth act sleepwalking scene is a turning point in the play, and her line, "Out, damned spot!," has become a phrase familiar to many speakers of the English language. The report of her death late in the fifth act provides the inspiration for Macbeth's "Tomorrow and tomorrow and tomorrow" speech.