In September 2007 a group of young researchers who repeatedly met at conferences realized that they were all fascinated by the complex interplay of personality and social relationships. While we studied the effects of personality on very different social processes (e.g., zero acquaintance judgments, group formation, friendship development, mate choice, relationship maintenance), we shared a strong focus on observing real-life phenomena and implementing advanced methods to analyze our data. Since the official start of Persoc in late 2008, several meetings and workshops have deepened both, our interconnectedness as well as our understanding and interest in personality and social relationships. Persoc is funded by the German Research Foundation (DFG).