Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for previewing search results. In one aspect, a method includes receiving a query from a client device. One or more image search results are provided to the client device, each of the one or more image search results identifying a corresponding image resource and each of the one or more image search results including an image representation of the corresponding image resource. One or more related queries are provided to the client device, the one or more related queries having been determined to be related to the query, wherein each of the one or more related queries includes a preview image to be displayed at the client device, the preview image representing an image search result responsive to the related query.