Desi Arnaz was probably the best in the industry when it came to being prepared for every single scene. His incredible near-photographic memory allowed him to read and memorize every one of his lines with just one script reading. Staffers on the show said he never messed up his lines, despite very little preparation. In fact, he’d often skip rehearsals and table reads to attend to DesiLu Studios business (more on that later). Plus, not only was he a whiz at memorizing his own lines, Arnaz reportedly would even memorize other character’s lines to make sure everything was on point. Talk about preparation!