Infanta Margarita Teresa in a Blue Dress is one of the best-known portraits by Spanish painter Diego Velázquez.

This is one of the several court portraits made by Velázquez on different occasions of Infanta Margaret Theresa who, at fifteen, married her uncle, Leopold I, Holy Roman Emperor.

These paintings show her in different stages of her childhood; they were sent to Vienna to inform Leopold of what his young fiancée looked like.

The Kunsthistorisches Museum in Vienna has two other paintings by Velázquez: Infanta Maria Teresa and Portrait of Prince Philip Prospero.

The young girl, who is presented as pretty and appealing, has a pale countenance which is enhanced by the blue and silver tones.