Today was a good day for muggles everywhere as Warner Bros. released a brand new trailer for "Harry Potter and the Half-Blood Prince," the sixth film in the wildly successful fantasy franchise. In it, we get forecasting of a very dark future for Harry and the Hogwarts crew, and never-before-seen footage of Professor McGonagall, Narcissa Malfoy, Luna Lovegood.

Check it out below, and then click here to check out our behind-the-scenes visit to the "Harry Potter and the Half-Blood Prince" set.