Steven Spielberg isn't just the director of several classic movies featuring aliens. He's also a believer.

His father, Arnold Spielberg, was an electrical engineer and big science fiction reader who "put it into my mind that we are not alone," the Oscar winner told E! News ahead of the June 12 release of Disclosure Day, his fifth film about extraterrestrials in our midst. "He wasn’t talking about Earth, he was talking about the cosmos.”

But while Spielberg "was born believing that out there life exists, intelligent life exists," he didn't just take his dad's word for it.

Rather, he continued, “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."

And he's listening to the experts here on Earth, too, the 79-year-old telling CBS News that, based on "everybody I've listened to and every documentary I've ever watched and all the testimonies in Congress that I've heard, I absolutely think that they have been here, and they are here. And who knows, maybe they've always been here."

Spielberg has admittedly never had his own close encounter—"I deserve a sighting," he quipped to CBS. "I mean, I'm an ambassador to these guys"—but his open mind is shared by wife Kate Capshaw and their kids, who "are very open to the experiences that others have had."

Of course, there's a lot of wiggle room between expecting little green men to descend from a spaceship and entertaining the possibility that Earth hasn't cornered the market on intelligent life.

Former President Barack Obama raised eyebrows in February by answering in the affirmative when asked on a podcast if aliens are real, though he clarified on Instagram that he meant "the odds are good there's life out there."

Hence no disclosure day on his watch. But from Miley Cyrus and Demi Lovato's alleged UFO sightings to Tom Cruise and Emily Blunt's assertions that thinking we're alone in the world is pure arrogance, see all the stars who are willing to entertain the idea of aliens:

Singing the praises of Carl Sagan, Stone—fresh from playing a CEO who's mistaken (or is she?) for an alien in Bugonia—said during the 2025 Venice Film Festival she agreed with the late astronomer's take that to assume that "we're alone in this vast expansive universe" is "pretty narcissistic."

"So, yes," the two-time Oscar winner continued, "I'm coming out and saying it: I believe in aliens."

Fairly certain she "got chased down by some sort of UFO," Cyrus described a close encounter with what looked like a "flowing snowplow" while driving through San Bernardino, Calif.

"There were a couple of other cars on the road and they also stopped to look," the singer told designer Rick Owens during a 2020 chat for Interview, "so I think what I saw was real."'

She "didn't feel threatened at all," Cyrus continued, "but I did see a being sitting in the front of the flying object. It looked at me and we made eye contact, and I think that’s what really shook me, looking into the eyes of something that I couldn’t quite wrap my head around."

"Millions of stars and we're supposed to be the only living creatures?" Cruise, fresh from deftly handling an alien invasion in War of the Worlds, told the German publication Bild in 2005. "No, there are many things out there, we just don't know."

Asked again in 2013 if he believed in aliens, the Oblivion star acknowledged to the U.K.'s 5 News he'd "never met one," but "how arrogant of us to think we're the only living beings in all of the solar systems of forever. I think I would have to go…maybe."

Don't worry, the director of Close Encounters of the Third Kind and E.T. isn't a closet skeptic.

“I’ve always believed,” Spielberg told E! News ahead of the release of Disclosure Day, his latest film about aliens making contact with Earth. “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."

"I think it would be an arrogant thing to presume we are alone in the universe," the Disclosure Day actress told TIME, "or that we are the most powerful, technologically advanced civilization."

Blunt's Disclosure Day costar called it "not that far-reaching that there's life beyond," but he questioned why aliens would want to come to Earth.

"It's not that great here," he quipped to TIME. "When you hear accounts of people who have had these experiences, they weren’t traumatic. The traumas come from the way people responded, how they’ve been patronized and gaslit and shunned. I completely believe that they had those encounters."

The Unidentified With Demi Lovato alum has explained that her confidence in the existence of extraterrestrials comes from a "profound experience" she had stargazing on her 28th birthday in 2020.

Her group was looking to make "contact," she told Entertainment Weekly, when directly above them in the sky they saw "huge lights that made a question mark."

And, she said, "You would think that I would be freaked out, but what I have found in these experiences is the love, and there's no fear."

"I believe there are aliens out there," the Nope director told EW in 2022. And if they come to Earth, he won't be telling them to get out.

"Sometimes I think if aliens came down, I would turn on all of y'all, like, in a heartbeat," he said on Late Night With Seth Meyers. "I feel like there might be room for one prime human."

Long before she traveled to the edge of space, Perry sensed there was something big up there to behold.

"I see everything through a spiritual lens," she told GQ in 2014. "I believe in a lot of astrology. I believe in aliens. I look up into the stars and I imagine: How self-important are we to think that we are the only life-form?"

The 44th POTUS posited on a February episode of No Lie With Brian Tyler Cohen that, when it comes to aliens, "They're real."

After his comment roiled the political universe and beyond, Obama clarified that he was speaking more broadly—as opposed to disclosing any alleged government secrets. "Statistically, the universe is so vast that the odds are good there's life out there," he wrote on Instagram. "But the distances between solar systems are so great that the chances we've been visited by aliens is low, and I saw no evidence during my presidency that extraterrestrials have made contact with us. Really!"

"There’s so much unexplained and unexplainable phenomena that’s presented to us," Reeves, who played dapper alien Klaatu in The Day the Earth Stood Still, told Parade in 2008. " We can’t be the only sentient entity. It might not look like us, but it’s going to be out there."

The country singer told Us Weekly in 2015 that she had "seen several UFOs."

And the tally went up in April, Musgraves sharing in an Instagram video that she "just had the craziest f--king orb UFO experience" during a flight to Fort Worth.