Abū-Muhammad Muslih al-Dīn bin Abdallāh Shīrāzī, Saadi Shirazi, better known by his pen-name as Saʿdī or simply Saadi, is one of the major Persian poets of the medieval period.

He is not only famous in Persian-speaking countries, but has also been quoted in western sources.

He is recognized for the quality of his writings and for the depth of his social and moral thoughts.