Some of you may be wondering who's playing the new chracters in OOTP so i'll tell you:
Bellatrix Lestrange:Helen McCroy
Imelda Staunton:Dolores Umbridge
Luna Lovegood:Evanna Lynch
Natalie Tena:Nymphodra Tonks
Robbie Jaruis:Young James Potter
Kathryn Hunter:Arabella Figg
George Harris:Kingsley Shaklebolt