Matt Smith hasn't regenerated into Peter Capaldi yet, but the latest advertisement for Doctor Who: The Time of the Doctor, the series' Christmas special due out on Wednesday in which the change occurs, is all Capaldi, all the time.
Granted, it isn't much time; the TV spot is only seven seconds long.
You can check it out below, along with the official description from BBC One.
As the 11th Doctor bows out ... we see a glimpse of the future Doctor. Its all in the eyes!