I dont know what I can describe about this character without giving everything away.

Jessica Chastain is aware that she cant really talk about her very mysteriousDark Phoenixcharacter.

Says Simon Kinberg, Her character is way way smarter than we are.

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Doane Gregory/Fox

The actress became friends with Kinberg onThe Martian, which he produced.

I was really excited for him to have his directorial debut and also it was the script.

I was really pleased with this script because I think its a departure from the norm.

Instead of big booming speeches (see: Apocalypse), Chastain is quietly threatening.

Theres something very clinical about it.

He loved it and we kind of expanded the character from there.