New Delhi, Nov 21 (ANI): Brad Pitt has reportedly refused a main part in his upcoming film '12 Years A Slave' amid concerns that his young children would get disturbed by the shocking imagery. The 49-year-old actor admitted that maybe he would let his eldest child watch the film, but for the others, he rather let them get a bit older and understand the dynamics of the world a little more. The film, directed by Steve McQueen, is a true story based on Solomon Northup's personal account of being a free man in New York in the pre-civil war days and who is kidnapped and sold into slavery.