In preparing for the role, Kutcher learned just how complex Jobs' character really was.
"He was complicated insomuch as he was a very aggressive leader and he had a brutal, blunt honesty that a lot of people, I think, are afraid to have," Kutcher said. "And I think it was his strength, but it was always, at some points, also his fault."
One interesting thing Kutcher learned about Jobs was that the former Apple CEO didn't necessarily see the shareholder as the priority.
"He cared so much about creating a beautiful, brilliant, innovative, wonderful, exciting product, an experience, and he made it magical and powerful and he also understood the power of vertically integrating his hardware," Kutcher said. "In turn, the stockholders benefited, but I don't think it was ever his goal to please the stockholders. The stockholders were a result, they were an effect of, and the cause was is he cared about the consumer and cared about the consumer experience."
Directed by Joshua Michael Stern, the movie will be released August 16 in the United States.
—By CNBC's Drew Sandholm. Follow him on Twitter