Lady Macbeth: Ambition, Guilt and the Original Villain

2026-06-01

Lady Macbeth enters the play reading a letter. Macbeth has written to tell her about the witches' prophecy: he may become king. Her response isn't joy or uncertainty. It's a clear-eyed assessment of whether her husband has the stomach to do what's required.

"Yet do I fear thy nature. It is too full o' the milk of human kindness." She sees the problem immediately. Macbeth wants the prize. He flinches at the method. She decides to provide what he lacks.

The "Unsex Me Here" Speech

Before Macbeth arrives home, she delivers a speech alone on stage in Act 1, Scene 5 that tells us who she is and what she's prepared to sacrifice. She calls on dark spirits to "unsex me here," asking them to strip away what she sees as the softening, compassionate elements of her femininity. She asks them to "stop up the access and passage to remorse" and to "fill me from the crown to the toe top-full / Of direst cruelty."

The speech is a precise diagnosis of the Elizabethan world she inhabits. Compassion, in her view, is not a virtue. It's a vulnerability. She can't afford it.

She can't commit the murder herself, partly because of the practical setup Shakespeare writes and partly because female violence carried a different, more damnable weight in the period's moral framework. So she needs to become the engine that drives Macbeth's will. She needs to harden him, then direct him.

Stronger Than Macbeth, Until She Isn't

Through the first two acts, Lady Macbeth is the dominant figure. When Macbeth comes downstairs after killing Duncan, carrying the daggers he should have left with the guards, she's the one who holds things together. She takes the daggers back, smears the guards with blood, and tells Macbeth to wash his hands and compose himself.

Then something changes. After the banquet scene in Act 3, Scene 4 (where Macbeth sees Banquo's ghost at the table and nearly unravels in front of the entire court), Lady Macbeth has no scenes until Act 5, Scene 1.

She simply disappears from the play for over an act. By the time she returns, she is completely different.

The Sleepwalking Scene

Act 5, Scene 1 is one of Shakespeare's most precisely constructed scenes. A gentlewoman and a doctor watch Lady Macbeth walk in her sleep, rubbing her hands compulsively. She's trying to wash off blood that isn't there.

"Out, damned spot, out, I say!" She relives Duncan's murder in fragments. Then the killing of Lady Macduff. Then Banquo. The doctor observes: "More needs she the divine than the physician."

The woman who asked the spirits to stop up her remorse has been destroyed by exactly that: remorse. She suppressed her guilt so completely that it has taken over in sleep, where she has no control. She dies offstage in Act 5, Scene 5. Malcolm reports she died by her own hand.

How She's Been Performed

Sarah Siddons played Lady Macbeth for over two decades from 1785, and she set the standard for the role throughout the 19th century. Her interpretation was cold, imperious, and terrifying. Audiences reportedly fainted during her sleepwalking scene. She became so closely identified with the part that critics stopped comparing later actresses and simply noted how far they departed from her.

Judi Dench took a different approach in the RSC's 1976 production, directed by Trevor Nunn, with Ian McKellen as Macbeth. Dench played Lady Macbeth not as a monster but as someone who genuinely loves her husband and talks herself into catastrophe on his behalf. It's still considered one of the great Shakespeare productions of the 20th century.

The difference matters. A cold schemer who falls apart is one kind of story. A woman who dismantles herself in service of someone else's ambition, and finds the damage too great to survive, is a harder and sadder one.

Read more on the Macbeth characters page: Lady Macbeth.