Dominic Monaghan is scared for his life after an accused stalker threatened to assassinate him just like the famous Beatle.
As TMZ reported, Meredith McLarty's been harassing the actor since 2014 ... but things got real scary when cops say she tweeted, "Three words ...Mark David Chapman..." She went on, "Save #domswildthings."
Chapman's the guy who killed John Lennon in 1980 and @domswildthings is Monaghan's Twitter handle ... so it's pretty clear McLarty threatened to murder the actor.
The woman tweeted the threat in March, 2015, but the info just became public in legal docs.
Monaghan got a restraining order last year but McLarty was undeterred and got arrested for violating it by continuing to tweet and email him.
As of now, she's on the run. There's currently a warrant out for her arrest.