Hamill posted a photo of himself posing in his trailer on the set, pointing to a sign that says Master Hamster in the window.
For those curious about the Master Hamster reference, Hamill fans are called Hamsters, so that would make Hamill the Master Hamster.
"People keep asking me over & over & over again - 'When will they release the #EpisodeIX trailer?'" Hamill tweeted. "A) I don't know. B) Until they do, just be satisfied with this exclusive look at my own personal #StarWars trailer. #PatiencePadawans #IXWillBeFineAllInGoodTime"
That is an actual trailer he posted a photo of. And since it's on the Star Wars set when they were filming, technically Hamill did share the first Star Wars: Episode 9 trailer on Twitter.
This isn't the first timewith hinting at upcoming Star Wars movie title and plot points, but it may be one of the funniest.
premieres Dec. 19 in the UK and Dec. 20 in the US and Australia.