09/02/2008 at 07:00 AM EDT
It's not a new message. But Jude Law
wants the world to "give peace a chance."
The actor has traveled to Afghanistan to promote a new documentary for the Peace One Day organization – a group which campaigns for an annual global ceasefire on Sept. 21.
"Please mark the day," he told a news conference in Kabul, Reuters reports. "The need now is greater than ever before."
The Oscar-nominated Brit produced and appears in the film, called The Day After Peace
, alongside Angelina Jolie
, the Dalia Lama and singer Annie Lennox.
"Jude was overwhelmed on his first trip to Afghanistan last year by the incredible spirit of the people that he met there," a friend tells PEOPLE. "He's making good his promise to show them the film. He feels that [the movie] can spread the message to work towards at least one day of peace a year."
While in the country, Cold Mountain
star and the documentary's director, Jeremy Gilley, will meet with President Hamid Karzai along with VIPs from the United Nations and key aid agencies.