Laertes /leɪˈɜːrtiːz/ is a character in William Shakespeare's play Hamlet. His name is taken from the father of Odysseus in Homer's Odyssey. Laertes is the son of Polonius and the brother of Ophelia. In the final scene, he kills Hamlet with a poisoned sword to avenge the deaths of his father and sister, for which he blamed Hamlet. While dying of the same poison, he implicates King Claudius. The Laertes character is thought to be originated by Shakespeare, as there is no equivalent character in any of the known sources for the play.
In the first act, Laertes is seen warning Ophelia against Hamlet's romantic pursuit of her, saying Hamlet will soon lose his desire for her, and that it is not Hamlet's own choice but the king's as to whom he will marry. Before Laertes returns to France from Denmark, returning to Denmark only to attend the coronation of King Claudius, his father, Polonius, gives him advice to behave himself in France.
During Laertes's absence, Hamlet kills Polonius in Gertrude's parlor. Laertes, informed of his father's death, returns to Denmark, and leads a mob to storm and take the castle. Laertes confronts the King, thinking he was responsible for Polonius' death. The King explains to him who the real killer was, and incites Laertes to kill Hamlet and avenge Polonius' death.
When Ophelia appears in her mad condition, Laertes laments, saying that if she had her wits she could not persuade him more to revenge. Later, Laertes is informed of her death. She had climbed into a willow tree that hung over a brook, and then fell into the water when a branch broke. Too insane to save herself, she drowned. His sister's death strengthens Laertes's resolve to kill Hamlet. At her funeral, Laertes asks why the normal Christian burial ceremony is not being carried out for his sister, and rebukes the priest for questioning her innocence. He leaps into her grave and begs the attendants to bury him with her. Hamlet, who was previously watching from afar, advances and himself leaps into Ophelia's grave. When Laertes attacks Hamlet, the two have to be held back to avoid a fight.