Originally Posted by The_Mighty_Thor
Looks alone aren't enough for casting someone but at the same time if you're going to suggest someone for a role it's only natural that you use a picture that looks the most like the character you're suggesting them for. That doesn't mean it's the only reason you're suggesting them.
I could see Carey Mulligan playing a Janet van Dyne type character. The only problem I would have is her height. If I was being strictly true to character then the Wasp is supposed to be short even amongst other female characters. She's supposed to be pixie like even in her normal human form. Somebody who's 5'7" is just too tall for that role.
Any actress can rock a pixie cut; what I'm looking for in Janet Van Dyne is the pixie personality. Zooey Deschanel, or someone very like Zooey Deschanel, would be ideal for her.