The '12 Years a Slave' actress, who will appear on the cover of the fashion magazine's annual issue, said fame has affected her personal life in a major way.
"I've had somebody say, 'I want you at my wedding, but I don't want you to pull focus, so wear jeans!'
"Losing my anonymity is something that's proving to be very challenging. It's good for your soul to walk around unnoticed; there's so much you can't do when everybody knows who you are. And so I miss those little things," she said.