Who said that an iron curtain had descened around eastern Europe?

Winston Churchill famously said that an "iron curtain" had descended across Eastern Europe in his speech on March 5, 1946, at Westminster College in Fulton, Missouri. This phrase metaphorically represented the division between the Soviet-controlled Eastern Europe and the Western democracies during the early Cold War period. Churchill's speech highlighted the growing tensions and ideological divide between the East and West.