1. Steven Spielberg first learned about Jurassic Park during a meeting in 1989, with the book’s author, Michael Crichton. The two had actually met to discuss a screenplay he had written for what would eventually become the TV series ER.
2. High-profile directors who were also interested in adapting the book into a movie included James Cameron, Richard Donner, and Tim Burton.
Crichton's agents circulated the book to various studios and directors, ultimately Spielberg was able to acquire the rights to the book.
Facts via: Entertainment Weekly
3. Harrison Ford turned down the role of Dr. Alan Grant.
4. Spielberg famously lured acclaimed British director Sir Richard Attenborough out of a 14-year acting retirement and cast him as John Hammond. But Jurassic Park was actually the third film Spielberg had asked him to appear in.
5. In 1983, Attenborough's film Gandhi beat out Spielberg's E.T. the Extra-Terrestrial for the Academy Award for both Best Picture and Best Director.
6. Jim Carrey auditioned for the part of Ian Malcolm, and according to the casting director, Janet Hirshenson, he did a terrific job.
7. Both Helen Hunt and Gwyneth Paltrow were considered for the role of Dr. Ellie Sattler.
Fact via: Today Show