Timotheus of Miletus (Ancient Greek: Τιμόθεος ὁ Μιλήσιος; c. 446 – 357 BC) was a Greek musician and dithyrambic poet, an exponent of the "new music." He added one or more strings to the lyre, whereby he incurred the displeasure of the Spartans and Athenians (E. Curtius, Hist of Greece, bk. v. ch. 2). He composed musical works of a mythological and historical character. He spent some years in the court of Archelaus I of Macedon.