Helena Bonham Carter
Bonham Carter played Bellatrix Lestrange in Harry Potter and the Order of the Phoenix, Harry Potter and the Half-Blood Prince, and Harry Potter and the Deathly Hallows parts 1 and 2. She received good reviews as Lestrange, as she was described as a "shining but underused talent."  She then played Mrs. Lovett in Sweeney Todd, which was also released in 2007.