The "Star Wars" vet is trending right now ... and it's all because he name-dropped himself in response to a Twitter user suggesting (or daring?) that he could garner well over a thousand "likes" on the platform by merely writing "Mark Hamill." That's how much he's adored.

Welp, he caught wind of her theory ... and decided to put it to the test, which ended up in staggering results -- not to mention others getting in on the fun as well.

Dude quote-tweeted this chick and did exactly what she said ... writing simply, "Mark Hamill." As of right now ... that same tweet is on its way to 100k likes, and over 4k retweets!!!

Sure enough, the Internet took notice ... and wanted to try it out themselves -- almost like a Candyman thing, where if you say his name ... Twitter likes will appear. Some are finding success -- like George Takei, who did the same and has racked up over 4k likes.

Ditto for actor Ken Olin ... who openly wondered if the rule would apply to any Schmo who tried this -- and yes ... his "Mark Hamill" tweet is also taking off, with well over 3k likes.

Of course, normies (AKA, non-blue checkmarks) are having a harder time getting the "like" love on their own timeline ... which just goes to show, a little Twitter notoriety goes a long way. Followers help too ... but it seems this "challenge" is reserved for the bird app elite.

As for the OG poster for this trend ... she's basking in the Hamill glory, especially since he digs her "Star Wars" memes and mega-fandom. He's even commenting on her other tweets.