Madsen tells Showbiz Tonight she actually had a personal connection to the role: "I was really fascinated by her story for many, many years when she was living and I met her a couple of times."
Best known for her roles in "Sideways" and "Candyman," Madsen says she was excited to take on a roll she's not normally offered. “I loved playing this role because it was real character role for me and I got to do a lot of things I am not allowed to do in movies,” Madsen tells Showbiz Tonight. "I got to wear some crazy wigs and put on a lot of weight.”
See more of Madsen's interview tonight at 11 p.m. ET/PT on Showbiz Tonight.