MUMBAI: A mini movie on the Harry Potter franchise is reportedly being shot secretly at the Potter studios in Hertfordshire.

Actress Helena Bonham Carter, who played Bellatrix Lestrange in the Harry Potter series, has been shooting for the film.

It is through this film that Daniel Radcliffe rose to fame after playing lead role of boy wizard while Emma Watson and Rupert Grint played his best friends Hermione Granger and Ron Weasley.

The film is likely to be shown at one of the two theme parks which are under construction. One of the theme parks will open in California by 2014, while the other will be ready to open in Japan by 2016.

The eight-part franchise, based on author J.K Rowling's book, came to an end last year.