British actor David Oyelowo plays which civil rights campaigner in the film "Selma"?

Selma is a 2014 historical drama film directed by Ava DuVernay and written by Paul Webb. It is based on the 1965 Selma to Montgomery voting rights marches led by James Bevel, Hosea Williams, Martin Luther King Jr., and John Lewis. The film stars actors David Oyelowo as Martin Luther King Jr., Tom Wilkinson as President Lyndon B. Johnson, Tim Roth as George Wallace, Carmen Ejogo as Coretta Scott King, and Common as James Bevel.

Selma premiered at the American Film Institute Festival on November 11, 2014, began a limited US release on December 25, and expanded into wide theatrical release on January 9, 2015, two months before the 50th anniversary of the march. The film was re-released on March 20, 2015 in honor of the 50th anniversary of the historical march.

Martin Luther King Jr. (January 15, 1929 – April 4, 1968) was an American Baptist minister and activist who became the most visible spokesperson and leader in the civil rights movement from 1955 until his assassination in 1968. Born in Atlanta, King is best known for advancing civil rights through nonviolence and civil disobedience, tactics his Christian beliefs and the nonviolent activism of Mahatma Gandhi helped inspire.