Donald Trump says he will hit films made in foreign countries with 100% tariffs, as he ramps up trade disputes with nations around the world.
The US president said he was authorising the Department of Commerce and Trade Representative to start the process to impose the levy because America's film industry was dying "a very fast death".
He blamed a "concerted effort" by other countries that offer incentives to attract filmmakers and studios, which he described as a "national security threat".
Filmmakers have for years left Hollywood for destinations including the UK and Canada to lower costs. One non-US union said the tariff plan would be a "knock-out blow" to the international industry.