Meanwhile, Sebastian is still alive and so arrives in Illyria with his protector and friend. His protector Antonio has protected him since the occurrence of the shipwreck and has grown attached to him.
Sir Andrew, who is also in love with Olivia, notices Olivia’s attraction to Cesario and challenges ‘him’ to a duel.
Sebastian appears on the scene, Sir Andrew and Sir Toby are tricked into thinking Sebastian is Cesario. Olivia enters and asks Sebastian (thinking he is Cesario) to marry her. Sebastion is confused but still says yes
Later, Orsino and Cesario make their way to Olivia’s house where she introduces Sebastian as her new husband. Orsino grows furious.
However, Viola’s disguise is revealed and the siblings reunite.
Orsino also finds out that Viola is actually a girl and so falls in love with her. He then proposes to her and they get married.