* Koi... Mil Gaya (2003): This film stars Hrithik Roshan as a young man who befriends an alien, played by the late Jadoo. It's considered a classic in Bollywood and is known for its heartwarming story and special effects.
* Mr. India (1987): While not directly about aliens, this iconic film does feature an alien-like creature called "Mogambo" who is the antagonist.
* Aag (2007): This action-thriller film stars Amitabh Bachchan and features a plot revolving around a group of aliens who come to Earth to steal a powerful weapon.
* Lakshmi (2014): This supernatural horror film features an alien creature as the source of the supernatural events.
There are many other Hindi movies with alien elements, but these are some of the most prominent and well-known ones. If you're looking for a specific type of alien movie, let me know, and I can try to help you find it!