Who Gave the 'I Have a Dream' Speech?

During the Civil Rights Movement in the United States, various strategies and efforts were employed to end racial segregation and discrimination against African Americans. One of the pivotal events that marked significant progress in this movement was the March on Washington in 1963. This event is famous for its role in advocating for civil and economic rights for African Americans.

Which of the following speakers delivered the iconic 'I Have a Dream' speech during this event?