I don't think she acts like a "diva". I think the whole thing about not going to Aly's wedding was just because they probably aren't "close". Also, they didn't go to her wedding. Sarah is probably just the type of person who likes to keep to herself, not snobbish, but reserved maybe. I'm the same way. Some people think that I'm a snob, I'm not, I just don't talk to people that I'm not close to. By that I mean that I am shy I guess you'd say. But at the same time I am very approachable if someone wanted to chat with me. Not everyone on the set is buddy buddy. I've heard James say in interviews that Sarah was his best friend on the set. Also, Sarah and Michelle T. were very close as well.