Lady Macbeth is the real driving force behind the murder of Duncan.

I think Lady Macbeth played a huge role in the murder of King Duncan. She was the one who persuaded her husband it was a good idea after he had told himself that it wasn't and decided to leave it to chance because after all, the other predictions that the witches had told him had come true. The witches had planned where they were going to meet Macbeth. 'Upon the heath. There to meet with …

…on the guards but he is ashamed. 'I'll go no more: I am afraid to think what I have done; look on 't again I dare not.' She takes the daggers and puts them by the sleeping guards. While she is doing that, there is a knock at the castle door and she leaves the bloody scene to wash the blood away. Macbeth is left wishing that the continuous knocking would awaken the king.