1. A method comprising: displaying, within a graphical user interface, an image that depicts one or more faces; detecting one or more faces within the image; receiving user input that selects a face of the one or more faces to be a currently-selected face; selecting a set of images, from a collection of images, that closely match the currently-selected face, concurrently with display of the currently-selected face, displaying each image in the set of images; providing, within the graphical user interface, a control that enables a user to select a target image from the set of images; and in response to detecting that the user has selected a target image using said control, associating the currently-selected face with a person to which the target image corresponds; wherein the method is performed by one or more computing devices.