The famous civil rights leader who delivered the "I Have a Dream" speech is Dr. Martin Luther King Jr. He delivered this iconic speech during the March on Washington for Jobs and Freedom on August 28, 1963. In his speech, King articulated his vision of a racially integrated and harmonious America, where individuals would be judged by their character rather than their skin color. The speech became a defining moment in the Civil Rights Movement, symbolizing the struggle against racial injustice and inequality. King's powerful oratory inspired countless individuals and is remembered as a pivotal moment promoting civil rights and social justice in the U.S.