Witherspoon researched the character by studying sorority girls on their campuses and associated hot spots. She went to dinner with them and joked she was conducting an "anthropological study." "I could have gone into this and been really ditsy and played what I would have thought this character was, and I would have missed a whole other side of her," Witherspoon added. "But by going down to Beverly Hills, hanging out in Neiman Marcus, eating in their cafe and seeing how these women walk and speak, I got into the reality of the character. I saw how polite these women are, and I saw how much they value their female friendships and how important it is to support each other."