One of the largest UFO festivals in the U.S. is almost here as alien enthusiasts get ready to come together and celebrate in downtown McMinnville.

Jeremy Corbell is encouraged and optimistic about the first batch of alien and UFO files being released by the government ... he says the transparency here is a long time coming. The UFO expert and filmmaker joined us Friday on "TMZ Live,

Credit: Project Gravitaur If you're seeking the best UFO documentaries, we have done a deep-dive into aliens, UAP craft, whistleblowers and psy to dig up where watch UFO docs – from "S4: The Bob Lazar Story" to "The Age of Disclosure" and more.

7 p.m. Friday, May 15, Lincoln Recital Hall, PSU Campus, 1620 S.W. Park Ave.; tickets $15-$30. Classes 7 p.m. Saturday, 2 p.m. Sunday which are free and open to the public. See the schedule here: pdx.edu/music-theater/steinway-piano-series.