It is our great pleasure to welcome you to the second Lifelog Search Challenge - LSC'19, at ACM ICMR'19 in Ottawa, Canada. Motivated by the success of the first LSC in 2018 and driven by the realization that lifelog organisation and retrieval continue to pose significant challenges for the research community, the organisers have run a second in the series of LSC workshops. The mission of the LSC workshop is to support the development and comparative evaluation of interactive lifelog retrieval systems by releasing test collections and defining research challenges to be solved by the community in an open and collaborative manner. LSC'19 is a participation workshop, which means that the participants write and present an academic paper describing their retrieval system, as well as taking part in the live interactive search competition. At LSC'19 there will be nine short oral presentations, followed by the search challenge integrating both expert users in a private session and novice users in a public session, which never fails to excite.The call for papers attracted submissions from Asia and Europe and ultimately nine papers were selected for inclusion in the program, from Austria, China, the Czech Republic, Denmark, Ireland, Switzerland, Taiwan and Vietnam. Each of these papers is accompanied by a working interactive search engine. The organisers are delighted that four of the six participating teams from the first LSC have refined their search engines for LSC'19. This means that five of |