偽ドミトリー1世
Mniszech was a daughter of Jadwiga Tarło and Polish Voivode-Governor of Sandomierz Jerzy Mniszech – one of the organizers of the Dimitriads, which were instigated by the appearance of a man who claimed to be Ivan the Terrible's son. Marina Mniszech's marriage to False Dmitriy I provided an opportunity for the Polish magnates to control their protégé. Mniszech met False Dmitry I around 1604 or 1605, at the court of one of the Commonwealth magnates, and agreed to marry him. In return for her hand Dmitri promised her Pskov and Novgorod, and her father Smolensk and Severia. After Dmitri captured Moscow in June 1605, in November he sent a diplomatic mission to Poland, asking for Marina's hand and proposing a military alliance to defeat the Ottoman Empire.