Luna Lovegood
In the book, Harry Potter and the Order of the Phoenix, Luna is described as a dirty blonde with “straggly, waist-length” hair, “very pale eyebrows”, and protuberant eyes that always made her looked surprised. Her eyes are later said to be grey. Evanna Lynch who plays Luna Lovegood has light blue eyes, not grey, and her hair in the films was closer to platinum blonde than dirty blonde. Nonetheless, the actress’ excellent loopy portrayal of the character made up for any small differences.
Luna Lovegood
Neville Longbottom
For some reason or other, Neville doesn’t get much of a description in the Harry Potter books. Besides for being “a round-faced boy,” as Rowling writes in Sorcerer’s Stone. However, Rowling did give more details on how she pictured Neville in an interview, saying that “to me, Neville’s short and plump and blond.” Back in the early Harry Potter days, Matthew Lewis who plays Neville Longbottom did fit the character really well, aside from his brown locks. However, Lewis coined the phrase Neville Longbottoming by becoming extremely attractive in the later films, which was poorly fitting with Neville’s continued awkward appearance.
Neville Longbottom