(born Jessica Howard)
I've seen people joke that she's Ron Howard's daughter. I wondered where "Chastain" came from. Turns out it was her mother's maiden name.
I've also seen a lot of talk about her age. Here's a quote from her...
I donít like revealing how old I am. I played a teenager in a movie recently and Brad Pittís wife in another so I like to think I can be any age I need to be - Source
A sensible plan, but curiosity among fans put her at 35. Here's her yearbook photo from 1995Ö