Embodiments generally relate to sharing photos in a social network system. In one embodiment, a method includes obtaining a plurality of photos associated with a target user in a social network system, and detecting a face of one or more persons in the plurality of photos. The method also includes computing significance values for the faces, where each significance value indicates a degree of significance between the target user and each person represented by each face. The method also includes generating a significance ranking of the significance values, and determining a group of photos for the target user based on the significance ranking.