Ivanka Trump's Stalker Gives Death Threat to Hollywood Agency Over Kim Kardashian

William Morris Endeavor claims they have received death threats by a man obsessed with meeting Kim Kardashian ... and the guy has already been locked up for stalking Ivanka Trump.

WME filed a restraining order, obtained by The Blast, describing the harassment by a man (we are choosing not to name,) who they claim left a voice message for a senior exec saying, "Talk down to me and I will blow your fucking brains out of your skull and you will see motherfucker ... the answer is I can see Kim Kardashian or who the fuck do I have to take the fuck down to see her."

The agency says the guy also showed up at their offices multiple times and has become increasingly aggressive over getting access to Kardashian. He's also been escorted off the premises by security.

The guy has a history with stalking celebrities, in 2012 he was sentenced to six months in jail after he was convicted of aggravated harassment towards Ivanka Trump.

He was also arrested near Trump Tower shortly after Donald became President.

WME has already filed a police report with the Beverly Hills Police Department, and cops took a "suspicious circumstance" report and advised the agency to seek a court order.

The temporary restraining order was granted, and the man must stay at least 100 yards away from WME and all its employees.

A hearing has been set for next month to make the order permanent.