Whether you believe in extraterrestrial life or not, a new documentary -- “Sirius” -- will have you in awe, as scientists promise to reveal a tiny alien creature measures six inches from head to toe.

“Sirius,” which has its Hollywood debut on April 22 and limited release at select theaters across the nation shortly after, begs the ever-so-intriguing question if life exists beyond Earth.

And the man behind it all?

He's Washington D.C.-based physician Steven Greer, director of the Center for the Study of Extraterrestrial Intelligence (CSETI) and the Disclosure Project, a “research project working to fully disclose the facts about UFOs, extraterrestrial intelligence, and classified advanced energy & propulsion systems,” according to its website. The site also states: “We are interested in the development of a peaceful relationship with Extraterrestrial Intelligence (ETI) which has been visiting planet Earth for decades if not centuries.”

"What people need to understand is the secrecy around UFOs and extraterrestrial intelligence really has nothing to do with ETs,” Greer said in an on-camera interview. “It has to do with humans and the power that is resting in large corporations and financial interests that do not want you to know the truth.”

The film is Greer’s latest attempt in shedding more light on the issue, saying extraterrestrial visits “has been kept secret,” on the project’s website.

Not only will “Sirius” unveil the alien creature, which is supposedly a humanoid entity of “unknown classification,” it will also explore how these visitors travel from their home to Earth using readily available forms of alternative energy technology, like zero point or quantum vacuum energy generation systems instead of harmful energy sources like the burning of fossil fuels.

"This really is the greatest story never told," Greer said. "Once people understand that classified projects have figured out how UFOs operate, they will realize we no longer need oil, coal and nuclear power. This is the truth that has driven the secrecy."

To learn more about Greer and his documentary, connect with him on Facebook and Twitter @DrStevenGreer.

Check out the official trailer and sneak peak of “Sirius” below: