My initial though was Hilary Swank, but I'm rethinking that. She not quite cute enough for my mental image (I'm picturing brown doe eyes and a smattering of freckles--but the freckles are negotiable). Here is a picture of the hero, if that helps.
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I'd love to hear any thoughts you have. I hope that once I have a clear visual of my heroine, my muse might just start working again.