Mario Puzo, the author of The Godfather books who helped adapt them to film, had no formal training and had never written a screenplay before. After winning two Oscars for the first two movies, he decided to buy a book to help him learn to how to screenwrite. – WTF Fun Facts
Source: https://www.npr.org/2019/03/08/701492922/a-look-back-at-the-godfather-with-mario-puzo-and-francis-ford-coppola
screenplay
WTF Fun Fact – Woody Allen Typewriter
Woody Allen has only ever used an early 1950’s manual Olympia SM-3 typewriter that he purchased when he was 16. Every script, screenplay, or comedy sketch was written on this one typewriter. – WTF Fun Facts
Source: http://www.openculture.com/2013/01/woody_allens_typewriter_scissor_and_stapler.html