This prophecy is fulfilled in the first act of the play, when King Duncan names Macbeth Thane of Cawdor after the previous holder of the title is executed for treason.
2. He would become the King of Scotland.
This prophecy is fulfilled in the third act of the play, when Macbeth has Duncan murdered and seizes the throne.
3. He would be overthrown by a man "not of woman born".
This prophecy is fulfilled in the fifth act of the play when Macbeth is killed by Macduff, who was born by Caesarean section.