The former Spice Girl and the soccer star want to treat the Harry Potter fan and his friends to a huge bash at the castle in North East England, to celebrate him entering his teens next March, reported Daily Star.
"Brooklyn is absolutely mad on Harry Potter so it will be a special treat. He`ll be blown away to be in the palace where Harry and his friends learned to play Quidditch and cast spells. There`s nothing like seeing where the real magic was made," said a source.
David and Victoria - who have three other children, Romeo, eight, Cruz, six and seven-week-old Harper Seven - are planning to hire the entire castle for Brooklyn`s birthday so he can have his own Battleaxe and Broomsticks tour, one of the special daily events at the castle.
This is not the first time the couple have splashed out on Brooklyn`s birthday. They threw a lavish 10,000 pounds bash when he turned one, which included a magician, a face-painter and four clowns.
The youngster`s ninth birthday was a celebrity-filled occasion with stars including with Eva Longoria Parker and Heidi Klum attending the party at Los Angeles restaurant Pink Taco.