Agathon (Greek Άγάθων) (c. 448–400 BCE) was an Athenian tragic poet and friend of Euripides and Plato. He is best known for being mentioned by Aristophanes in his Thesmophoriazusae and for his appearance in Plato's Symposium, which describes the banquet given to celebrate his obtaining a prize for his first tragedy (416). He was the long-term (10-15 years) beloved of Pausanias, who also appears in the Symposium and Protagoras.