Former US presidential hopeful Mitt Romney surprised film-goers when he came to the premiere of MITT, the documentary that tracks his run for the White House.
"If he hated it, I don't know if he's going to tell me," director Greg Whiteley said. "He's nice and he and (his wife) Ann are gracious. I wonder what they really think."
Whiteley said the Sundance Film Festival premiere Friday was the Romneys' first look at the film, which will debut on Netflix on January 24.
Mr Romney and his wife were also expected to attend the premiere of the film in Park City, Utah.
Whiteley said he has long admired the Romneys because, as a Mormon, he heard of Mr Romney's father George while growing up.
George Romney, a moderate Republican, headed the American Motors before being elected governor of Michigan. He lost out to Richard Nixon in his bid to become the Republican presidential nominee in 1968.
"What Hank Greenberg and Sandy Koufax is to young Jewish kids probably is what George Romney was to me," Whiteley said. "When I heard that Mitt Romney was running for president, I had just finished my second film and it occurred to me that might make a great movie."
Through a meeting with Mr Romney's eldest son Tagg, Whiteley pitched the documentary idea and he "thought it was great".
Whiteley had unfettered access to the Romney family, which made campaign officials nervous, but the family went along with it anyway.
Part of any campaign strategy, Whiteley said, is to "present the most polished, most veneered, most presidential image as you can".
"What we forget is we need to connect with these people," he said. "They're human beings and that gets lost in all of this."
The portrait of Mr Romney in MITT is very human. He is shown playing in the snow with his grandchildren, eating pasta from a plastic takeaway container and brainstorming with his family about what to say in a concession speech.
He discusses the pros and cons of his presidential run with his wife, children and siblings and intimate footage shows his moments of confidence and doubt and the emotional toll the campaign took on his family.
Romney comes across as warm and likeable, but the director said that was not the goal of the film.
"I had no agenda in trying to make him look good," Whiteley said. "I had no agenda in trying to convince people to vote for him."
He describes the film as "very apolitical", adding: "I really saw my job as to just shut up, film everything I can, and when I'm editing this footage, just try and find a balance between just being as honest and authentic and as entertaining as I possibly can."
The Sundance Film Festival continues until January 26.