Milla
I love Milla Jovovich (and yes the Resident Evil movies). She has a sort of seventies vibe to her but, still modern. I am always a little leery about models turned actors but, I think she is actually pretty good. The key to doing a variety of things is to do them well and I think she has from her acting, music, to fashion.
She designed the costuming in the extinction movie which was a desert post apocalyptic. It is not my personal aesthetic but, I loved it. Maybe that should be my next design challenge, Apocolyptic Rainbow!