Newsround Online has another piece of exclusive casting news for the next Harry Potter film.
The role of Magorian, a centaur in the Forbidden Forest will be played by Michael Wildman, his agency revealed.
The actor has appeared in several TV and film roles, ranging from Casualty to The Merchant of Venice.
It's unclear whether Michael will be enhanced by special effects, or if the character will be computer generated, with Michael just doing his voice.
With filming about to begin on The Order of the Phoenix, more casting - including many major roles - is expected to be announced within the next 24 hours, and we'll have that news as soon is it's out.
The fifth Harry Potter will be released sometime in 2007.