The famous civil rights activist who delivered the speech titled "I Have a Dream" was Martin Luther King Jr. during the 1963 March on Washington for Jobs and Freedom. His speech emphasized the need for racial equality, justice, and the importance of civil rights legislation. King’s powerful words and vision of a racially integrated America resonated deeply, galvanizing public support for the civil rights movement. His speech is considered one of the most iconic in American history and remains a symbol of the ongoing struggle for equality and justice.