Entourage star Jeremy Piven is threatening legal action against a stage productionn mocking his controversial bout of mercury poisoning last December.

New York’s acclaimed Public Theater Arts Group has hit headlines with their new knee-slapping production The Piven Monologues, a spoof look at the fallout form Piven’s illness from eating too much sushi — which prompted the actor to pull out of Broadway play Speed-The-Plow to the chagrin of show producers.

Jeremy doesn’t see the humor, and his legal team recently fired off a letter to theater bosses promising to keep a watchful eye on The Piven Monologues.

“We didn’t say you cannot do the play, we said you can’t make defamatory statements about our client,” the actor’s attorney Marty Singer told The New York Post’s PageSix Column on Tuesday.