Ah, well-a-day! he’s dead, he’s dead, he’s dead!
We are undone, lady, we are undone!
Alack the day! he’s gone, he’s kill’d, he’s dead!

– William Shakespeare

Romeo and Juliet, Act 3, Scene 2. When the Nurse arrives in Capulet’s orchard where Juliet is waiting for Romeo, she is in a distressed state and delivers the shocking news: "he’s dead." She is lamenting Tybalt’s killing by Romeo, but she doesn’t mention him by name. This leads Juliet to think that it is Romeo who is dead. The audience knows that Romeo is very much alive, so making this an example of dramatic irony.