Question: Who played Katherine Johnson in Hidden Figures along with African American mathematician, Dorothy Vaughan?

Context articles: List of accolades received by Hidden Figures
Gloria Ford Gilmer
Octavia Spencer
Watling Street (book)
Hidden Figures
Hidden Figures (book)
Arthur Harold Stone
Love Begins at 20
Dorothy Vaughan
Margot Lee Shetterly

"Hidden Figures" is a 2016 American biographical comedy-drama film directed by Theodore Melfi, and written by Melfi and Allison Schroeder, who adapted the screenplay from the non-fiction book "Hidden Figures" by Margot Lee Shetterly.
 The film's plot focuses on female African-American mathematicians at NASA, specifically Katherine Johnson (played by Taraji P. Henson), who calculated flight trajectories for Project Mercury and the 1969 Apollo 11 flight to the Moon, Dorothy Vaughan (Octavia Spencer), and engineer Mary Jackson (Janelle Monáe).
 Kevin Costner plays the supporting role of Al Harrison and Jim Parsons plays the role of Paul Stafford.
 20th Century Fox gave the film a limited release from December 25, 2016, before a wide release on January 6, 2017.
Gloria C. Gilmer ("née" Ford; b. Baltimore, Maryland) is an American mathematician and educator, notable for being the first African American woman to publish a non-PhD thesis.
 She was in line to be the fourth African American woman to earn a PhD until she took time off to raise a family, though she later went on to acquire it, still being one of the first few.
Octavia Lenora Spencer (born May 25, 1972) is an American actress and author.
 She made her film debut in the 1996 drama film "A Time to Kill".
 Her breakthrough came in 2011, when she starred as Minny Jackson in the period drama film "The Help", for which she won the Academy Award, Golden Globe, SAG, BAFTA, and Critics' Choice Movie Award for Best Supporting Actress.
 She had a critically acclaimed performance in Ryan Coogler's drama "Fruitvale Station" (2013), for which she received the National Board of Review Award for Best Supporting Actress.
 Spencer has received acclaim for her work in the films "Smashed" (2012), "Snowpiercer" (2013), "Get on Up" (2014), "The Divergent Series" (2015-2016), "Zootopia" (2016) and "The Shape of Water" (2017).
 In 2017, she received Academy Award, Golden Globe, and SAG nominations for Best Supporting Actress for her performance as mathematician Dorothy Vaughan in the drama "Hidden Figures".
Watling Street: Travels Through Britain and Its Ever-Present Past is the fifth book by the British journalist, novelist and cultural historian John Higgs.
 The book charts Higgs's journey along Watling Street, one of the oldest roads in Britain, from Dover to Anglesey, during which journey he records the so-called hidden history of this ancient path from its first creation up to the present day.
 As well as recording the historical figures and their stories surrounding the road, Higgs also meets up with and interviews contemporary figures along the way such as Alan Moore.
 The author describes the history of the road as, "Watling Street is a road of witches and ghosts, of queens and highwaymen, of history and myth, of Chaucer, Dickens and James Bond.
 Along this route Boudicca met her end, the battle of Bosworth changed royal history, Bletchley Park code breakers cracked Nazi transmissions and Capability Brown remodelled the English landscape.
Hidden Figures is a 2016 American biographical drama film directed by Theodore Melfi and written by Melfi and Allison Schroeder, based on the non-fiction book of the same name by Margot Lee Shetterly about black female mathematicians who worked at the National Aeronautics and Space Administration (NASA) during the Space Race.
 The film stars Taraji P. Henson as Katherine Johnson, a mathematician who calculated flight trajectories for Project Mercury and other missions.
 The film also features Octavia Spencer as NASA supervisor Dorothy Vaughan and Janelle Monáe as NASA engineer Mary Jackson, with Kevin Costner, Kirsten Dunst, Jim Parsons, Glen Powell, and Mahershala Ali in supporting roles.
Hidden Figures: The American Dream and the Untold Story of the Black Women Who Helped Win the Space Race is a 2016 non-fiction book written by Margot Lee Shetterly.
 The biographical text follows the lives of Human Computers such as Katherine Johnson, Dorothy Vaughan, and Mary Jackson, three mathematicians
Arthur Harold Stone (30 September 1916 – 6 August 2000) was a British mathematician born in London, who worked mostly in topology.
 His wife was American mathematician Dorothy Maharam.
 His first paper dealt with squaring the square, he proved the Erdős–Stone theorem with Paul Erdős and is credited with the discovery of the first flexagon, a trihexaflexagon while he was a student at Princeton University in the USA in 1939.
 The Stone's metrization theorem has been named after him, and he was a member of a group of mathematicians who published pseudonymously as Blanche Descartes.
 He is not to be confused with American mathematician Marshall Harvey Stone.
Love Begins at 20 is a 1936 American comedy film directed by Frank McDonald and written by Dalton Trumbo and Tom Reed, based on the 1929 play "Broken Dishes" by Martin Flavin.
 The film stars Hugh Herbert, Patricia Ellis, Warren Hull, Hobart Cavanaugh, Dorothy Vaughan and Clarence Wilson.
 The film was released by Warner Bros. on August 22, 1936.
Dorothy Johnson Vaughan (September 20, 1910 – November 10, 2008) was an African American mathematician and human computer who worked for the National Advisory Committee for Aeronautics (NACA), and NASA, at Langley Research Center in Hampton, Virginia.
 In 1949, she became acting supervisor of the West Area Computers, the first African-American woman to supervise a group of staff at the center.
Margot Lee Shetterly (born 1969) is an American nonfiction writer who has also worked in investment banking and media startups.
 Her first book, "Hidden Figures: The Story of the African-American Women Who Helped Win the Space Race" (2016), is about African-American women mathematicians working at NASA who were instrumental to the success of the United States space program.
 She sold the movie rights while still working on the book, and it was adapted as a feature film of the same name, "Hidden Figures" (2016).
 For several years Shetterly and her husband lived and worked in Mexico, where they founded and published "Inside Mexico," a magazine directed to English-speaking expats.