A major campaign to persuade people in Scotland to vote for independence has been launched, with Hollywood star Brian Cox telling people: "We have arrived at the moment to realise our potential."

With the Scottish Government planning an independence referendum for autumn 2014, the drive to win over voters has begun in earnest.

The launch of the Yes Scotland campaign saw famous faces such as Cox and X-Men actor Alan Cumming team up with politicians including First Minister Alex Salmond.

Supporters at the event, staged in an Edinburgh cinema, signed a "Yes declaration" stating it is "fundamentally better" if decisions about the country's future are taken by the people of Scotland.

It aims to get one million voters to sign it before the referendum.

Meanwhile, a poll commissioned by former Labour Chancellor Alistair Darling found just 33% of people agree that Scotland should become independent, with 57% opposed and 10% undecided.

Mr Darling, who is co-ordinating the campaign to keep Scotland in the UK, said: "The Nationalists are entitled to their view but the majority of us simply aren't buying the independence policy they're selling."

But Cox, who starred in Braveheart and The Bourne Identity, urged people to vote Yes, saying: "We have arrived at the moment to realise our potential. Please let's not waste it. Please let's say Yes."

Mr Salmond said supporters at the launch were there to "unite behind a declaration of self-evident truth" that "the people who live in Scotland are best placed to make the decisions that affect Scotland".

The SNP leader went on: "I want Scotland to be independent not because I think we are better than any other country but because I know we're as good as any other country.

"Like these other nations, our future, our resources, our success should be in our own hands."

Loading Slideshow...
  • News Pictures Of The Day: 25 May

    The French team compete in the synchronised teams technical routine during the 31st LEN European Swimming Championships, on May 25, 2012 in Eindhoven. (Photo credit: JOHN THYS/AFP/GettyImages)

  • News Pictures Of The Day: 25 May

    Indonesian fans of Inter Milan celebrate their team's victory at the end of a friendly football match between Indonesia and Inter Milan, in Jakarta on May 24, 2012. Inter Milan won 3-0 against the Indonesian all star team. (Photo credit: ROMEO GACAD/AFP/GettyImages)

  • News Pictures Of The Day: 25 May

    Lawmakers from pro-presidential and oppositional factions in the parliament session hall in Kiev, Ukraine, Thursday, May 24, 2012. A violent scuffle erupted in Ukraine's parliament over a bill that would allow the use of the Russian language in courts, hospitals and other institutions in the Russian-speaking regions of the country. (Photo credit: AP Photo/Maks Levin)

  • News Pictures Of The Day: 25 May

    An opposition lawmaker Mykola Petruk receives first aid after fighting between pro-presidential and opposition factions in the parliament session hall in Kiev, Ukraine, Thursday, May 24, 2012. A violent scuffle has erupted in Ukraine's parliament over a bill that would allow the use of the Russian language in courts, hospitals and other institutions in the Russian-speaking regions of the country. (Photo credit: AP Photo/Maks Levin)

  • News Pictures Of The Day: 25 May

    African migrants sit in a bus stop at Levinsky Park in southern Tel Aviv, early morning on May 25, 2012. Violent race riots that shook southern Tel Aviv two nights ago sparked shock in Israel, but also prompted top-level calls for the immediate arrest and expulsion of tens of thousands of African migrants. (Photo credit: MENAHEM KAHANA/AFP/GettyImages)

  • News Pictures Of The Day: 25 May

    A Cambodian Buddhist monk who lives in Aoral wildlife sanctuary (R) and children displaying Buddhist flags on a tree in the forest in Kampong Speu province, some 100 kilometers west of Phnom Penh. The fight against illegal logging has turned deadly in Cambodia, but villagers say the murder of a key activist has only hardened their resolve to take forest protection into their own hands. (Photo credit: TANG CHHIN SOTHY/AFP/GettyImages)

  • News Pictures Of The Day: 25 May

    Australian Prime Minister Julia Gillard (R) watches as Portugal's President Anibal Cavaco Silva signs the visitors book at Parliament House in Canberra on May 25, 2012. Cavaco Silva is making an official visit to Australia after visiting Indonesia. (Photo credit: ALAN PORRITT/AFP/GettyImages)

  • News Pictures Of The Day: 25 May

    A boat passes a giant image hanging from a building on the south bank of the River Thames in London showing Britain's Queen Elizabeth II, fifth left, and from left the royal family, Prince Charles, Prince Edward, Prince Andrew, Earl Mountbatten, Prince Phillip, Mark Phillips and Princess Anne standing on the balcony of Buckingham Palace during the Queen's 1977 Silver Jubilee, Friday, May 25, 2012. The giant canvas, measuring 100 meters by 70 meters and weighing nearly two tons, was officially unveiled on Friday and will be displayed until the end of June, in celebration of the Diamond Jubilee, marking the Queen's 60 year reign. (Photo credit: AP Photo/Matt Dunham)

  • News Pictures Of The Day: 25 May

    A worker abseils during a unveiling after helping to hang a giant image from a building on the south bank of the River Thames, London showing Britain's Queen Elizabeth II waving on the balcony of Buckingham Palace during the Queen's 1977 Silver Jubilee, Friday, May 25, 2012. The giant canvas, measuring 100 meters by 70 meters and weighing nearly two tons, was officially unveiled on Friday and will be displayed until the end of June, in celebration of the Diamond Jubilee, marking the Queen's 60 year reign. (Photo credit: AP Photo/Matt Dunham)

  • News Pictures Of The Day: 25 May

    A Faberge silver-gilt and enamel frame circa 1890-1895 is displayed at Sotheby's auction house in London, Friday, May 25, 2012. The frame estimated at 30,000-50,000 pounds (US$47,000- 78,000) once belonged to Princess Nadeja Bariatinsky who was murdered by the Bolsheviks in 1920, will go on sale in the Russian Art sale on May 28, 29 and 30. (Photo credit: AP Photo/Kirsty Wigglesworth)

  • News Pictures Of The Day: 25 May

    Lawmakers block the work of the Ukrainian parliament in protest of a language draft law in the parliament session hall in Kiev, Ukraine, Friday, May 25, 2012. The poster reads: The destruction of language - the destruction of the Motherland.' On Thursday evening a violent scuffle erupted in Ukraine's parliament over a bill that would allow the use of the Russian language in courts, hospitals and other institutions in the Russian-speaking regions of the country.(Photo credit: AP Photo/Sergei Chuzavkov)

  • News Pictures Of The Day: 25 May

    French World Champion Sebastien Loeb and his co-driver Daniel Elena in their their WRC Citroen DS3 compete at the WRC Acropolis Rally of Greece at the stage of Elikonas, central Greece, on Friday, May 25, 2012. (Photo credit: AP Photo/Petros Giannakouris)

  • News Pictures Of The Day: 25 May

    German Chancellor Angela Merkel, center, casts her vote for an extension of the country's contribution to the KFOR mission in Kosovo at the parliament Bundestag in Berlin, Friday, May 25, 2012. The German parliament extends the country's contribution to the NATO-led mission in Kosovo for another year. (Photo credit: AP Photo/Markus Schreiber)