Before she was the voice of Lisa on "The Simpsons," then-19-year-old actor Yeardley Smith sat down with Jane Pauley to talk about her role in the Broadway play "The Real Thing" and opens up about the thoughts she jots down in her diary. This originally aired on TODAY on April 25, 1984. For more context and news coverage of the most important stories of our day, click here: nbcnews.com » Subscribe to NBC News: nbcnews.to/SubscribeToNBC » Watch more NBC video: bit.ly/MoreNBCNews NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features NBCNews.com, MSNBC.com, TODAY.com, Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows. Connect with NBC News Online! NBC News App: https:...