United Kingdom, Sept. 18 -- Lily-Rose Depp has insisted she "definitely believes" in aliens and says anyone who doesn't is just being "silly".

The 27-year-old daughter of Johnny Depp and Vanessa Paradis opened up about her extra-terrestrial beliefs while promoting her new movie Alpha Gang, which follows a group of aliens as they discover Earth for the first time.

Asked during an interview with People if she believes in aliens, Lily-Rose replied: "I feel like the universe is so vast and massive that it would be silly to think there was nothing else out there than us.

"It would be quite egotistical to be like, 'No, it's just us.' So I definitely believe in aliens.

"Maybe some are friends, maybe some are foes. I feel like we have no idea...