Josh Gad has said that audiences will be "amazed" by the Steve Jobs film, Jobs.
The 32-year-old portrays Apple co-founder Steve Wozniak in Joshua Michael Stern's upcoming biopic, which stars Ashton Kutcher as his co-creator Steve Jobs.
"It's an incredible film in that it's so inspirational," he said at Disney's D23 Expo.
The film, which premiered at the 2013 Sundance Film Festival, is based on the life of the late inventor from 1971 until the introduction of the iPod in 2001.
Josh, who voices the character of snowman Olaf in Disney's Frozen, continued: "It's almost a prequel to the story that everybody knows, an origins story in that it traces Jobs in the first part of his life before the iPod was launched and all that happened.
"That was a part of the story I didn't even know about really so I think that people are going to be really surprised and amazed by it."
The actor admitted he was disappointed he couldn't meet his real-life counterpart.
"Unfortunately, I didn't have the chance to meet Steve Wozniak because he was consulting on another Jobs film but I feel like I've met him, in that I studied him ad nauseam before I jumped into the role," he added.
Jobs will be out in US cinemas on August 16, with a UK release yet to be announced.