Steven Spielberg's belief in aliens did not begin with a studio pitch, a visual effects breakthrough, or a conveniently timed marketing campaign. According to the filmmaker, it started at home, long before E.T. the Extra-Terrestrial made extraterrestrial loneliness into a family movie with better lighting than most living rooms.

Speaking to E! News ahead of his new alien film Disclosure Day, Spielberg said he has never really had to be convinced that life exists beyond Earth. For him, the idea was planted early by his father, Arnold Spielberg, an electrical engineer whose work helped shape the director's imagination.

How Arnold Spielberg shaped his son's view of the cosmos

"I've always believed," Spielberg said in the interview. "Even as a child, my father was an electrical engineer, and he worked on the very first computer for RCA years and years ago. My dad put it into my mind that we are not alone. He wasn't talking about Earth, he was talking about the cosmos."

Spielberg, now 79, said his father treated intelligent life beyond Earth not as fantasy, but as a reasonable conclusion from someone who understood technology, science, and scale.

"He said, 'There's intelligent life out there,'" Spielberg recalled. "And my dad read a lot of science fiction, so I was born believing that out there, life exists, intelligent life exists."

That childhood influence matters because Spielberg has returned to the subject for decades. His films have often treated alien life less as a monster-in-the-dark premise and more as a question about fear, curiosity, and how humans behave when the sky stops feeling empty.

Why Spielberg says the evidence started to feel credible

Spielberg said his thinking did not rest only on family conversations or science fiction books. As he grew older, he began paying closer attention to stories, reports, documentaries, and eyewitness accounts connected to unidentified aerial phenomena and alleged encounters.

"It sort of became urban legends much more than conspiracy theories," he said. "It really became consistently truthful. As I got older and older, I started believing that something really is going on that we're not being told."

That is a careful enough sentence to keep one foot in skepticism and the other in the cornfield. Spielberg is not claiming to have hosted interstellar guests for coffee. He is saying the volume and consistency of what he encountered over time made the subject harder for him to dismiss.

For an artist who has spent much of his career translating wonder and anxiety into mass entertainment, that distinction is useful. He is not pitching aliens as spectacle alone. He is arguing that the mystery has become emotionally and intellectually persuasive to him.

What he wanted Disclosure Day to feel like

Spielberg said Disclosure Day grew out of years of private research and note-taking. The film stars Josh O'Connor, Colman Domingo, and Emily Blunt, and Universal is positioning it as a sci-fi thriller rooted in plausibility rather than pure fantasy.

"There were notes I had been taking for three or four years," the Oscar-winning director said. "I had notes just based on what was out there, what I was hearing about. Documentaries that were being made about this subject matter and things that I was hearing from eyewitnesses and I just kept making notes and putting down ideas."

That process shaped the tone he wanted for the movie. Spielberg said he was not trying to make the biggest or strangest alien story possible. The goal was something that audiences might recognize as unsettling because it feels close enough to reality.

"I didn't set out aiming for the incredible," he said. "I set out to make something that could be very credible."

The movie he would show actual aliens

Asked what he would show extraterrestrials if they ever made themselves known to people on Earth, Spielberg did not choose one of his own films. No E.T., no Close Encounters, no victory lap.

"I wouldn't show them one of my movies," he said. "I'd show them Frank Capra's It's a Wonderful Life!"

It is a very Spielberg answer, really: less interested in proving human technical skill than in showing why humans keep trying, failing, loving, panicking, and occasionally improving. If aliens are taking notes, at least give them the full emotional paperwork.

Disclosure Day is scheduled to arrive in theaters on June 12.