Chloe Phillips met actor Richard Briers for the campaign launch

Chloe Phillips, from Bridgend in South Wales, has already raised �3,000 for the charity, landing good luck letters from the Queen and Tony Blair.

Her grandfather has had the condition since she was a baby.

Parkinson's disease is a progressive, degenerative, neurological condition affecting people's movements for which there is currently no known cure.

Last year Chloe, then aged eight, decided she wanted to raise money "to make Grampy better", by doing a sponsored walk up Mount Snowdon.

She raised sponsorship throughout the local community and received the good luck letters for her efforts.

Her mother, Mel Phillips, said: "We never expected the response we had from the sponsored walk. We aimed to raise about �100. She was ecstatic when she got to the top.

"I think she has done really well. The biggest part for her is that she has made more people aware of what has happened to her grampy."

Chloe's grandfather Kelvin Lugsden, 58, was diagnosed with the condition in 1996.

Specialist nurses

The poster campaign aims to raise the profile of the Parkinson's Disease Society (PDS) which has 20 support groups in Wales, and to promote the society's services, particularly its website and helpline.

Wales has nine Parkinson's disease nurse specialists working within the NHS.

New research by MORI suggests seven million people in the UK have a friend or family member affected by the condition.