Those behind the television series Game of Thrones have told President Donald Trump to stop appropriating imagery from the show.
On Friday, Mr Trump tweeted a mock Hollywood movie-style poster with the words "SANCTIONS ARE COMING".
Referring to a decision to reinstate sanctions on Iran, it echoed Game of Thrones' signature line: "Winter is coming".
HBO quickly issued a statement criticising the president.
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"We were not aware of this messaging and would prefer our trademark not be misappropriated for political purposes," the statement said.
It went on to tweet, "how do you say trademark misuse in Dothraki?" a fictional language from the show.
While cast member Maisie Williams, who plays Arya Stark, tweeted "not today".
George RR Martin, whose A Song of Ice and Fire series is the basis for the show, used the opportunity to urge people to vote in the upcoming midterm elections this Tuesday.
It's not the first time Mr Martin has taken a dig at Mr Trump.
In an interview with the New York Times in October, he compared the president to King Joffrey, a sadistic teenage ruler in Game of Thrones.
"They have the same level of emotional maturity. And Joffrey likes to remind everyone that he’s king," he said.
The US announced Friday it was adding 700 individuals and entities to its Iran blacklist and pushing the worldwide SWIFT banking network to cut Tehran off.
US officials said they were determined to force Tehran to give up its nuclear activities and what the US says is broad support for "terrorism" in the region.
It comes six months after Mr Trump's administration quit the 2015 Iran nuclear deal.
Additional reporting: AFP
