The prominent civil rights movement leader known for his "I Have a Dream" speech is Martin Luther King Jr. A key figure in the American civil rights movement during the 1950s and 1960s, King advocated for nonviolent resistance to combat racial segregation and discrimination. His speech, delivered during the March on Washington for Jobs and Freedom in 1963, called for racial equality, justice, and an end to discrimination. King’s powerful rhetoric inspired millions and is often regarded as a defining moment in the struggle for civil rights in the United States. His legacy continues to resonate, symbolizing the fight for justice and equality.