Is it me or is Jennifer Finnegan, who plays Annabelle Chase, the image of Julianne Moore? They're not related, I checked, but its quite spooky. She even has her mannerisms.
It may seem spooky but many actors use other actors usually successful ones as role models, whom they practise their techniques from such as mannerisms during particular types of scenes. For example the many eyebrow actors that came after Jack Nicholson. Hope that helps, it would be much more interesting though if there was some sacandalous familial relationship between them I must admit.