The Help star admits she has been "hyper-aware" of death since she was a young girl, when she began suffering from terrifying panic attacks.
She tells The Sunday Times Style magazine, "I'm close to my mortality. I think about it every day. Not in a freaky way, but constantly. I feel hyper-aware that everything could end. That's always been in my mind, for whatever reason, since I was very small... I think I tend to worry more when things are good. I know those times will change."
However, Stone insists she has made progress tackling her issues with the help of a therapist.
She adds, "You know, it (anxiety) ebbs and flows. It's nowhere near as bad as when I was a kid... I feel very comfortable talking about it... I was in therapy for two years as a kid. As someone with anxiety, you're constantly waiting for the next (attack). It's how my mind works.
"The reason I went into my job is because it gives you an outlet for all these emotions. My first-grade teacher put me in my first play because I had the jazz hands in me. A year later, I had my first panic attack. I mean, I had really, really bad anxiety as a kid, and improv (improvisation) was kind of my saviour."
More News on Hollywood.com