Irvin Shortess "Shorty" Yeaworth, Jr. (February 14, 1926 in Berlin, Germany – July 19, 2004, in Amman, Jordan) was a German-born American film director, producer, screenwriter and theme parkbuilder. He began his career singing at age 10 at KDKA, the world's first radio station in Pittsburgh, Pennsylvania. He later became a radio producer. He directed more than 400 films for motivational, educational, and religious purposes. 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.
In 2007, The Colonial Theatre in Phoenixville, Pennsylvania (the filming location of the famous "Running Out" scene in The Blob) honored Irvin Yeaworth and The Blob by holding a film contest in which amateur film-makers competed for the "Shorty" award. "Shorty" was Yeaworth's nickname.