Tragedy struck the Disney family on Saturday after Queen of Katwe co-star Nikita Pearl Waligwa died at just 15 years old after a battle with a brain tumor. The teenager played Gloria opposite young actress Madina Nalwanga – who starred as 10-year-old chess prodigy Phiona – as well as Selma star David Oyelowo and Lupita Nyong'o in the 2016 film.