Here are four of the characters from Pixar's Brave: Princess Merida, Queen Elinor, The Wise Woman and Lord MacIntosh. They will be voiced by Kelly MacDonald, Emma Thompson, Julie Walters and Craig Ferguson respectively.
UPDATE: Images removed at request of Pixar.
And here, I think is a fifth character. This is The Bear, as in The Bear and the Bow, the film's original title. I've blown up a part of the poster to highlight where I think he's hiding.
The first trailer for Brave is to play in cinemas with Cars 2. Can't wait to see it.
UPDATE: The images, I'm told, were once at The Pixar Blog, but I can't see them there now.