Filmmakers who made a documentary last year examining Iran's nuclear ambitions are asking members of the public to join a new online campaign highlighting the oppressive nature of the Iranian regime.
The Faces4Freedom campaign has been launched to protest against President Mahmoud Ahmadinejad's presence at this week's UN session.
The aim is to encourage people from around the world to upload videos and messages of solidarity with the Iranian population.
They said they wanted to use social media tools, employed so effectively by Arab Spring protesters this year, to show the Iranian people that others care about them.
"Ahmadinejad is a tool of tyranny, and an aggravator of world peace," said Alex Traiman, the director of the 2010 film Iranium. "Genuine democratic revolution in Iran can provide relief from decades of oppression to the Iranian people, and is in the strategic interests of the United States."
Mr Traiman's film, which has been screened in the US, Israel and Europe, was narrated by actress Shohreh Aghdashloo, who escaped from Iran during the Islamist revolution of 1979.
The documentary brought together real footage, news reports and expert commentary to outline the nature of Mahmoud Ahmadinejad's regime and the dangers posed by a nuclear-capable Iran.