“First Man” doesn’t hit theaters until October 12, but it’s already causing a fair amount of controversy.

After it recently premiered at the Venice Film Festival, one major detail was left out of the telling of the story, according to reports, about how America won the space race and put men on the moon.

“First Man” omits the planting of the American flag on the moon, one of the most significant moments in American history.

Actor Ryan Gosling, who stars as Neil Armstrong, defended the decision to the press and said the moon landing was a historical moment that “transcended countries and borders.”

“I think this was widely regarded in the end as a human achievement, [and] that’s how we chose to view it,” the actor added, according to The (U.K.) Telegraph.

“I also think Neil was extremely humble, as were many of these astronauts, and time and time again he deferred the focus from himself to the 400,000 people who made the mission possible.”

Moviegoers have already been calling for a boycott of the film on social media — and filmmakers such as James Woods, Nick Searcy and Robert Davi have all criticized the film’s omission.

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Fox News host and LifeZette co-founder Laura Ingraham was also among those blasting the film for the apparent cold shoulder it gave to America and patriotism.

“It’s another way of trashing patriotism,” she said Friday night on “The Ingraham Angle” about the film’s omission. “It’s another way of moving beyond the nationalism, or nationalistic spirit of the moment.”

“My feeling is, you’re doing a biopic — stick to the facts,” Fox News contributor Raymond Arroyo said on the program that night as well. “He planted an American flag. Plant an American flag.”

Buzz Aldrin (shown in the photo, above left, at the top of this article), who was on that original moon landing mission, recently was spotted wearing a T-shirt showing the American flag being planted on the moon.

While he has not commented specifically on the controversy surrounding the film, the image now has gone viral on social media.

An older tweet from Buzz Aldrin has also been making the rounds on social media.

In it, Aldrin says planting the American flag on the moon was his “proudest moment.”

It appears, however, that the filmmakers involved with “First Man” are thus far not affected by the controversy.

In addition to Gosling’s defense of the movie’s omission, actor Jason Clarke said that the controversy is “just silly and naïve, I think,” according to The Hollywood Reporter.

“Of course it celebrates one of the greatest acts of America and Americans and humanity and mankind.”

Clarke stars as Edward Higgins White, the first American man to walk in space, in the film.

The director of the film is a staunch anti-Trumper.

Director Damien Chazelle also shrugged off the hullabaloo in an interview with Variety.

“To address the question of whether this was a political statement, the answer is no. My goal with this movie was to share with audiences the unseen, unknown aspects of America’s mission to the moon — particularly Neil Armstrong’s personal saga and what he may have been thinking and feeling during those famous few hours,” he said.

Chazelle, by the way, is a staunch anti-Trumper.

He even said his motivation for joining Twitter last year was to criticize the president.

Watch the trailer for “First Man” below: