Nicole Kidman spilled “blood, sweat, and tears” en route to stardom. The Oscar-winning actress has enjoyed a hugely successful career, after making her film debut at the age of 15, but Nicole insists that she’s had to make lots of sacrifices along the way. Nicole, 56 – who was born in Hawaii, but grew up in Sydney, Australia – told ‘Extra’: “I had a dream of working around the world and I knew I wanted to act. I knew I wanted to act when I was six, seven years old. “I didn’t know I would have the opportunity to do it … I just pursued it and pursued it.” The award-winning star doesn’t have any …