The Workshop on Large-Scale Distributed Systems and Middleware (LADIS) brings together researchers and practitioners to share the challenges of building massive distributed computing systems and clouds. By raising research questions in the context of the largest and most-demanding real-world systems, LADIS serves to catalyze a dialog between cloud computing engineers and researchers in scalable distributed systems, to open the veil of secrecy that has surrounded many cloud computing architectures, and to increase the potential impact of the best research underway in the theory and practice of large-scale distributed systems. LADIS 2013 will be co-located with SOSP 2013 and be held on Nov. 2nd (afternoon) and Nov. 3rd, 2013.