 Pregnancy changed Peter Jackson (I) (qv)s vision of "Lord of the  Rings". Originally, he wanted to cast Lucy Lawless (qv) as  Galadriel and Uma Thurman (qv) as Arwen. Unfortunately, both  actresses became pregnant after being asked to read, and the roles  were filled in by Cate Blanchett (qv) and Liv Tyler (qv),  respectively.