The campaign, called "the big ask" online march, urges the public to use their camera or mobile phone to record a short video clip of themselves asking their MP to support the campaign. When they join the march their MP will automatically receive a link to the recording, and all messages can be viewed at www.thebigask.com.
The ad, by MacDonald, features a series of clips of some of the celebrities supporting the campaign, including James Blunt, Bill Oddie and Gillian Anderson. Each person highlights the importance of the campaign and appeals to the public to visit the website and join the online march.
The launch of "the big ask" online march coincides with a GfK NOP survey for Friends of the Earth, which reveals that over two thirds of people in the UK want the Government to introduce a new law requiring UK carbon dioxide emissions to be cut every year.
Tony Juniper, Friends of the Earth director, said: "Friends of the Earth's online march is a unique and fun way for people to call for action on climate change. Our survey shows that the vast majority of young people have never contacted their MP. But most want the Government to ensure that carbon dioxide emissions are cut every year."
Razorlight's Johnny Borrell, said: "It's absolutely crucial to make your voice heard by the elected government of this country; telling your MP that you care and that you want them to do everything they can to reduce carbon emissions."
MacDonald, director of 'The Last King of Scotland', said : "I'm delighted to be involved with the online march for 'the big ask' -- Friends of the Earth's climate campaign. We're the last generation that can prevent climate change from reaching catastrophic levels, but if we all pull together, we can do it. The Big Ask online march is a very exciting project as it mobilises people to send a personal video message straight to their MP, calling for a strong climate law."
Other celebrities taking part in the campaign include: James Blunt, Helen Baxendale, Bill Oddie, Alex Zane and Gillian Anderson.