The superstar mum adopted Jackson after splitting up with her partner of nine years, Stuart Townsend.
She told The Sun: "I've never felt more creative and with more energy but on the tiniest amount of sleep.
"I never knew I needed that little sleep. I always had eight hours and now it's, 'Wow, OK, you can function on just four'.
"But Jackson is great. I've always been very aware of balance and, even before I had a child, my life always takes priority to my work.
"I feel very blessed that I have this job but my job is not my life. I'm really lucky that I get to go and do this but my life is pretty kick-ass and I take real priority in that."
Charlize is considered to be one of the most beautiful women in the world. But the 36-year-old South African reckons she had a terrible time at school because she looked so odd.
"My early childhood was quite devastating. I had no teeth until I was 11," she said.
"I had these fangs because I had jaundice when I was a kid and I was put on so many antibiotics that my teeth rotted. They had to cut them out.
"So I never had milk teeth. That was tough, you know, being in school having photos taken while I was pretending I had teeth. It was hideous."
After a three-year break from the movies, Charlize will be returning to the spotlight in her new film, Snow White And The Huntsman, which had its premiere on Monday.