The actor shared her thoughts during an interview at Venice Film Festival, where she spoke to reporters about her latest sci-fi-comedy movie, Bugonia.

The movie follows two men who are obsessed with conspiracies, who become convinced that the CEO of a major company – played by Stone – is actually an alien who wants to destroy Earth.

Looking to bring her down, the men, played by Jesse Plemons and Aidan Delbis, then proceed to kidnap the boss.

Naturally, this plot led some reporters at Venice on to the topic of aliens, and Stone decided to share her thoughts loud and clear.

Stone explained her reasoning, telling the crowd that she’d been inspired by astronomer Carl Sagan, who is known for his research on the possibility of extraterrestrial life.

The La La Land actor said: “One of my favorite people who has ever lived is Carl Sagan and I fell madly in love with his philosophy, science and how brilliant he is.”

Stone indicated she shared in Sagan’s stance on aliens, pointing out that to believe that our world is the only one with life is pretty big-headed of us.

She said: “He very deeply believed the idea that we’re alone in this vast expansive universe – not that we’re being watched – is a pretty narcissistic thing.”

Conspiracy theorists in the movie think Stone’s character is an alien (Focus Features)

One reporter also jokingly asked Stone how she manages to live in the spotlight as a celebrity without ‘turning into an alien’ herself, to which the 34-year-old took a leaf out of Bugonia’s book.

“How do you know I’m not an alien?” she responded.

“We all can relate to that feeling of someone thinking they know you, feeling like you don’t have much control of the avatar outside of me. Because there’s me, and then there’s me, here. There’s the person who comes here and then there’s the person who I am with my friends and family. They’re the same person, but it’s what I do to keep myself sane.”