Manipur and Tripura are two important integral states of North east India with a long glorious history of its own. Both the states maintained cordial relationship from the very early period despite regular intervals of conflicts. Marriage alliances between the royal families of Manipur and Tripura were common phenomena which began from remote antiquity and continued till 20th century. The instance of first marriage alliance occurred during the reign of Tripura king Taidakshin, the 43rd Raja. However, the most notable cases (...) of matrimonial alliances between Manipur and Tripura started towards the end of 18th century. The distinctive feature in the marriages was that the Rajas of Tripura married not only Manipuri princesses but also many Manipuri girls belonging to plebeian family. The marriage alliances not only brought cordial relations between the two kingdoms but also there was cultural assimilation. The tradition of marrying Manipuri girls were even followed by many noblemen of the Tripura royal family. Tripura also witnessed various public welfare works that was contributed by the Manipuri Maharanis. Thus, we find that the Tripura royal house was filled with descendants from the Manipuri queens. This article focuses on providing a chronological historical account of the matrimonial alliances that occurred in the royal families of Manipur and Tripura during the period of monarchies. It also highlights the basic causes behind the arrangement of the marriages and also the cultural amalgamation between the two states. (shrink)