No, but he starred as an imprisoned South African apartheid activist opposite Michael Cane in "The Wilby Conspiracy," (1975) and again with Michael Cane in "Mandela and de Klerk" (1997), that time as...
I believe that Sidney Poitier did not attend college. He joined the United States Army in 1944. After that he work menial jobs in New York until he got a role at the American Negro Theatre.