"I am a worrier. I am living for every day and trying to have less fear, less worry. But I have always worried about everything. It's in my nature. It's the thing that makes me suffer the most," contactmusic.com quoted Cruz as saying.
"I don't like that about myself because it's really painful. That's still my main thing to work on," added the 37-year-old, who has one-year-old son Leonardo with husband Javier Bardem.