Michail Asen (Bulgarian: Михаил Асен) (c. 1322–1355) was the eldest son of Ivan Alexander of Bulgaria from his marriage with Theodora of Wallachia.

He married Maria, renamed Irina, the daughter of Andronikos III Palaiologos.

In 1354–1355 the Ottoman Turks invaded Bulgaria and headed towards Plovdiv and Sofia.

But the battle was not in vain: the Ottomans failed to capture the cities and did not attack the country up to 1370.

[2] In the Bulgarian folklore is mentioned that the son of the Emperor perished with the death of the brave.