The 45-year-old recalled meeting Kubrick for the first time with ex-husband Tom Cruise, reported Showbizspy online.
"Tom and I went to his house and had dinner, and I remember I was nervous. It was like having a great, great teacher.
"I remember thinking he was frail, and if I were more intuitive I would have realized that he was not well," Kidman said.
"One of the worst things was, I was going to call him on his last night alive and I didn't. Instead I got a phone call the next day saying Stanley was dead. It was one of my great regrets that I didn't call him that night," she added.