Big Brown (foaled April 10, 2005 in Kentucky) is a retired champion American Thoroughbred racehorse and winner of the 2008 Kentucky Derby and 2008 Preakness Stakes. Bred by Dr. Gary B. Knapp's Monticule Farms in Lexington, Kentucky, he won his first five races. He was sired by Grade III winner Boundary, a son of North American Champion sire Danzig, a son of Northern Dancer. Big Brown's dam was Mien, also a granddaughter of Northern Dancer through her sire, Nureyev.