The purpose of the Knowledge-aware and Conversational Recommender Systems (KaRS) Workshop is to provide a meeting forum for stimulating and disseminating research in Knowledge-aware and Conversational Recommender Systems, where researchers can network and discuss their research results in an informal way. The 2nd Knowledge-aware and Conversational Recommender Systems (KaRS) Workshop focuses on all aspects related to the exploitation of external and explicit knowledge sources to feed and build a recommendation engine, and on the adoption of interactions based on the conversational paradigm. The aim is to go beyond the traditional accuracy goal and to start a new generation of algorithms and approaches with the help of the methodological diversity embodied in fields such as Machine Learning (ML), Human–Computer Interaction (HCI), Information Retrieval (IR) and Information Systems (IS). Consequently the focus lies on works improving the user experience and following goals such as user engagement and satisfaction or customer value. KaRS 2019 is the 2nd edition of the Knowledge-aware and Conversational Recommender Systems (KaRS) Workshop. It will take place on November 3rd-7th, 2019, Beijing, China co-located with the 28th ACM International Conference on Information and Knowledge Management (CIKM 2019).