The 26-year-old actress, who is a self-confessed book lover, says she always prepares for every character she portrays after a thorough book reading, reported Elle.Com.
"When I was doing 'American Horror Story', I was reading a lot of Stephen King and became obsessed with 'The Shining'. And then I also read 'Shutter Island'. Books are a really fun way to get yourself in a certain mindset or mood as an actress," says Roberts.
"I always pick out a bookshelf for every character I play. I get around three or five books to have with me while I'm playing a character..."