The Greensboro Four were a group of four African American college students who sparked the sit-in movement during the Civil Rights Movement in the United States. On February 1, 1960, Ezell Blair Jr. (now known as Jibreel Khazan), David Richmond, Franklin McCain, and Joseph McNeil, all students at North Carolina A&T State University in Greensboro, North Carolina, walked into the Woolworth's department store and sat down at the "whites only" lunch counter.

Despite being refused service, they remained seated and peacefully protested the segregation policy by sitting at the lunch counter for hours. This act of nonviolent protest drew national attention and inspired similar sit-ins at Woolworth's and other segregated lunch counters across the South.

The sit-in at Woolworth's in Greensboro lasted six months and eventually led to the desegregation of the store's lunch counter. The Greensboro Four's actions marked a turning point in the Civil Rights Movement and demonstrated the power of nonviolent protest in the fight against racial segregation and discrimination.