(Θεσσαλός), an eminent tragic actor, in the time of Alexander the Great, whose especial favour he enjoyed, and whom he served, before his accession to the throne, and afterwards accompanied on his expedition into Asia. (Plut. Alex. 10, 29 ; Ath. xii. p. 538; Fabric. Bibl. Graec. vol. ii. p. 325.)
[P.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890