Boris Ivanovich Morozov (Russian: Борис Иванович Морозов; 1590 – 1661) was a Russian statesman and boyar who led the Russian government during the early reign of Tsar Alexis. Morozov came from a long noble line, yet was poor before his appointments. In 1634, when Tsarevich Alexis was five years old, Morozov was appointed as his tutor. This began Morozov's influence on the Russian court and affairs. On 17 January 1648, Morozov procured the marriage of the tsar with Maria Miloslavskaya, himself marrying her sister, Anna, ten days later, both daughters of Ilya Danilovich Miloslavsky.