Seabiscuit is a 2003 American sports film co-produced, written and directed by Gary Ross and based on the best-selling 1999 non-fiction book Seabiscuit: An American Legend by Laura Hillenbrand. The film is loosely based on the life and racing career of Seabiscuit, an undersized and overlooked Thoroughbred race horse, whose unexpected successes made him a hugely popular media sensation in the United States during the Great Depression. At the 76th Academy Awards, Seabiscuit received seven nominations, including Best Picture, but ultimately lost all seven, including six to The Lord of the Rings: The Return of the King.

Seabiscuit: An American Legend is a non-fiction book written by Laura Hillenbrand, published in 1999. The book is a biography of the Thoroughbred racehorse Seabiscuit. It won the William Hill Sports Book of the Year and was adapted as a feature film in 2003. It has also been published under the title Seabiscuit: The True Story of Three Men and a Racehorse. The author has been praised for her ability to convey a sense of historical times. The 2003 film Seabiscuit was adapted from the book.