The cast of Harry Potter are busy promoting the latest movie around the world right now following the London premiere. Last night, Emma appeared on David Letterman in New York City where she sported two different looks. She arrived in a polka dot dress with pink and black brogues, but soon changed in to a Christopher Kane frock and Charlotte Olympia heels. I think she looks great in both ensembles, but which do you prefer?

Source: WireImage