Doctor Who actor David Tennant and Sarah Harding of Girls Aloud are to appear in the latest St Trinian’s movie.

Tennant is due to play a villain in The Legend of Fritton's Gold, while Harding will star as a new school pupil.

The movie will also feature Rupert Everett and Colin Firth, who appeared in the 2007 St Trinian’s film.

The franchise, which is set in an all girls’ school, originally became a hit in the 1950s, and made stars of the likes of Barbara Windsor and Joan Sims.

The 2007 remake, which also starred Gemma Arterton and Russell Brand, became a huge cinema hit in Britain.

The seventh St Trinian’s movie is due to be released in December this year.