ZIELONA GORA, POLAND-In Harry Potter the young wizard's life is changed forever when he begins to receive hundreds of letters inviting him to Hogwarts School of Witchcraft and Wizardry.

So when a young Potter fan suffering from leukaemia was asked to make a wish on her sixth birthday she had an idea but never thought it would ever come true.  Oliwia Gandecka, from Zielona Gora, Poland, told her parents it would be really exciting if she could be sent lots of letters just like Harry.

The Birthday Card for Oliwia campaign was launched and people across the world were so touched by Oliwia's story she received not one but more than one millions cards as well as gifts on her birthday on October 26. 

The child even received a special message from Pope Francis.     Her parents turned to social media to start the campaign.

Marta Jagiello, friend of the family, said: 'After talking to her mother we found that this was her greatest wish, so we started a campaign on Facebook and on Harry Potter forums. 'Her big dream is to get a very large number of birthday cards. Just one card would have been enough to see her smile, but she was grinning from ear to ear when she saw all the well wishes she got from all over the world.' Within a week more than a million cards had arrived at her house and there are still more arriving.

'We had a problem keeping this a secret from her because there were so many. 'The postman was having problems delivering them, and we had to ask neighbours and friends to store some of them,' said mum Natasza. 'You can imagine her delight when she saw them all on her birthday,' she added.