Bellatrix Lestrange
From Tardis Wiki, the free Doctor Who reference
Bellatrix Lestrange was a dark witch whose identity was assumed by Yasmin Khan. (COMIC: Herald of Madness)
Behind the scenes
Bellatrix is an antagonist in the Harry Potter series.
Helen McCrory auditioned for the role of Bellatrix in the fifth film, Harry Potter and the Order of the Phoenix but had to drop out due to pregnancy. She ended up playing Bellatrix's sister, Narcissa Malfoy in the final three films.