"You want to be as accurate as possible... It was only four years ago, so people remember everything. So when you're playing somebody who's a living figure and culturally significant figure, you better try to get it right," Julianne told Access Hollywood correspondent Jill Martin at the film's premiere in New York City on Tuesday night.
Julianne said the research involved in both the book and the movie, about the Presidential election of 2008, was extensive.
"The book... is very heavily researched and sourced and so is the script," she told Jill.
"Everything in the movie has a source, so that was very, very important to me, because if we're just making something up then I have nothing to hang my hat on," she added.
In order to get her portrayal of the former Vice Presidential candidate just right, Julianne said she spent months with just Sarah's voice in her head.
Read more: yahoo
