Helen McCrory, who will be playing Narcissa Malfoy in Harry Potter and the Half-Blood Prince has recently been confirmed to finish out the entire series!

When Helena Bonham Carter had to replace her as Bellatrix Lestrange in Harry Potter and the Order of the Phoenix because the pregnant Helen wasn’t allowed by the insurers to perform the flying stunts required, Helen was offered another role instead as Narcissa Malfoy, Bellatrix’s sister and Lucius’s wife, in the next Potter film, The Half-Blood Prince, plus the one after that.

Thanks SnitchSeeker!