The actress told Ellen DeGeneres on her show that she is lucky to have Jackson in her life.
"He's great. He's great. You know, he pretty much he's just... I just scored big time. He's great. Seth calls him the little Republican."
When DeGeneres asked why, Theron came up with an interesting explanation about her two-year-old child's behaviour.
"Cause he's just always saying no... 'No, no, no, no, no, no...' Everything's no. No, no, no, no, no, no... No, Seth, no. Mama, no. No.' It's a lot of that," Theron joked.