- "I demand zero," each star says in video message to President Obama
- Video includes Michael Douglas, Whoopi Goldberg, Robert De Niro
- It is released before Obama's meeting with Putin in Northern Ireland
- Celebrities deliver lines from Obama's 2009 anti-nuclear weapons speech
Michael Douglas led a dozen Hollywood A-listers in a video aimed at reminding President Barack Obama that he told the world four years ago of the need to eliminate all nuclear weapons.
"I demand zero," said each star, including Oscar winners Douglas, Matt Damon, Morgan Freeman, Whoopi Goldberg, Christoph Waltz and Robert De Niro.
The video script consists of lines straight from Obama's landmark speech in the Czech Republic capital of Prague on April 5, 2009.
"Today, I state clearly and with conviction America's commitment to seek the peace and security," Obama is heard saying -- with Douglas and Naomi Watts both completing his sentence -- "of a world without nuclear weapons."
The celebrities -- also including Martin Sheen, Danny DeVito, Alec Baldwin, John Cusack and Zoe Kravitz -- tag-team to deliver Obama's words:
"This matters to people everywhere... Some argue that the spread of these weapons cannot be stopped, cannot be checked... Such fatalism is a deadly adversary... For if we believe that the spread of nuclear weapons is inevitable, then in some way we are admitting to ourselves that the use of nuclear weapons is inevitable. To denounce a call for cooperation is an easy but also a cowardly thing to do. That's how wars begin. That's where human progress ends. Make no mistake, when we fail to pursue peace then it stays forever beyond our grasp. It will take patience and persistence. But now we must ignore the voices who tell us that the world cannot change. Human destiny will be what we make of it. Let us bridge our divisions, build upon our hopes, accept our responsibility to leave this world more prosperous and more peaceful than we found it."
The video concludes with Obama speaking: "The world must stand together to prevent the spread of these weapons."
Global Zero -- a Washington-based group whose founders include Defense Secretary Chuck Hagel -- produced and released the two-minute video online just before Obama's meeting with Russian President Vladimir Putin at the annual G8 summit in Northern Ireland that starts Monday.
The United States and Russia hold 90% of the world's 17,000 nuclear weapons. There were 70,000 near the end of the Cold War in the mid-1980s.
An open letter to Obama that accompanied the video calls for the president "to negotiate further cuts to the massive U.S.-Russian Cold War stockpiles and pave the way to bringing world leaders into the first international negotiations in history for the elimination of all nuclear weapons."