Spaced star Jessica Stevenson has joined the ever swelling cast of the fifth Harry Potter movie.

The acclaimed comedienne, who appeared in the Royle Family and more recently Shaun Of the Dead, will play Mafalda Hopkirk, a witch from the Improper Use of Magic Office in the the wizard's fifth cinematic adventure - The Order Of The Phoenix - reports the Harry Potter Fan Zone.

Daniel Radcliffe, Rupert Grint and Emma Watson all return as the child leads backed by a stellar Brit cast including Ralph Fiennes, Michael Gambon, Brendan Gleeson, Jason Isaacs, Gary Oldman, Alan Rickman, Maggie Smith, Emma Thompson, Julie Walters, David Thewlis, Fiona Shaw, Richard Griffiths, David Bradley, Mark Williams and Helena Bonham Carter .

The film is due for released July 13 next year.