Describe the irony as revealed in Act 1 Scene 6 of Macbeth.Act I scene VI

In Act 1 Scene 6 of Macbeth, the
great irony is that King Duncan has arrived at Inverness to attend the dinner party and
Lady Macbeth greets him warmly. She and Macbeth, however, have already planned to murder
the king that same night. Of course, Lady Macbeth makes the king feel welcome and
safe--she puts on a false face so that he and others do not suspect that she and her
husband are up to any foul play. Lady Macbeth tells Duncan that she is honored to have
him in her home, and he says that he trusts his safety to them. So, dramatic irony is at
work in this scene--the audience and some characters know what has been planned while
others remain unknowing of events to come.