"Green Book" won Best Picture at this year's Oscars.
But the family of the man the movie is written about isn't pleased with how he's portrayed.
"Green Book" chronicles the story of black pianist and composer Donald Shirley on tour in the Jim Crow South.
In the picture, Shirley forms a friendship with Tony Vallelonga, a white man whom he hires to drive him on the trip.
Maurice Shirley II, Donald's nephew, said the film inaccurately portrays the musician as estranged from his family.
"Uncle Donald was at every family function when he wasn't on tour," Shirley II said.
He said some of Donald Shirley's values, such as "the emphasis of family and how strong the structure and the family dynamic was to him," were never shown in the movie.
"The film is, in fact, very filtered and very one-sided," he said.
Shirley II said the movie also sugarcoats heavy racial tensions during the time of the story in the interest of pushing the narrative of a friendship between its two main characters.
He said his family was not consulted for input before the film was made.
"There's been research in order to reach out to us now, and to get our narrative, our opinion, our feelings," Maurice Shirley II said. "But if this would've been done in the first place, we would have had a great biographical picture, and a great representation of the Uncle Donald that we knew and loved."
"Every barrier that he broke, and everything he did in terms of his genre of music, who he was as a man, I'm in sheer, utter, amazement every time I hear stories my father tells me." — Maurice Shirley II, on his uncle, Donald Shirley, who was featured in "Green Book"
He added he still cherishes his memories with his uncle, and that he hopes members of the public will research him, and listen to his music, to get a better understanding of the man Donald was.
"Every barrier that he broke, and everything he did in terms of his genre of music, who he was as a man, I'm in sheer, utter, amazement every time I hear stories my father tells me," Shirley II said.
Shirley II said he opted to not watch the film, knowing he takes issue with much of its content.
He noted that actor Mahershala Ali, who portrays his uncle in the picture, contacted his parents by phone.
Shirley II said their family bears no ill will toward Ali.
"I give (Ali) credit for having big shoes to fill, and for having the intestinal fortitude to give it his all," Shirley II said.