It is being reported that this Thursday WB will release a thousand balloons to celebrate pre-orders being taken for the Half-Blood Prince DVD and to launch a Deathly Hallows set visit competition. The winner will get to participate in a 'special filming experience'.

Each balloon will have a card with a unique code attached to it which may be entered here for the chance to win. Entries open on October 1st and close December 4th, with the winner being announced on December 7th, the UK release date for the DVD.

The winner will have a portrait in the final films.

Fifty runners-up will win lenticular cards.

The competition is open to UK residents, aged 18 or over.

Source: Leaky News