Irvin Shortess "Shorty" Yeaworth Jr. (February 14, 1926 – July 19, 2004) was a German-born American film director, producer, screenwriter and theme park builder. He began his career singing at age 10 at KDKA in Pittsburgh, Pennsylvania. He later became a radio producer. He directed more than 400 films for motivational, educational, and religious purposes, including television specials for evangelist Billy Graham. As an impresario, he directed the Wayne (Pa.) Concert Series from 1979 to 2003. However, he is best known for directing the classic film The Blob which depicts a growing, devouring alien slime.