The thesis focuses on language advising as a tool for supporting learner autonomy in English language learning. In current research, learner autonomy is viewed as a complex and dynamic system of skills, competences and predispositions, influenced by a range of factors, and thus changing across time and context. The aim of this thesis is to describe how language advising functions in a specific course and to observe, in individual participants, the various forms of support for learner autonomy that participation in advising sessions provides. Language advising, as a pedagogical tool, is based on acknowledging individual learner needs and should enable learners to take control of their own learning accordingly. Another goal of the research was to identify critical issues in the advising process with selected learners, thereby furthering understanding of the relationship between learner autonomy and language advising. The investigation provides findings on the course and impact of advising sessions conducted in the target language. Through a combined analysis of advising session recordings and secondary data on the learning process within the course, the research uncovered the complex dynamics between observed components of learner autonomy and learner participation in language advising. The research employed qualitative methods and resulted in creating a multi-case study. The analytical part drew on findings from previous studies. The work of Ciekanski, Benson, Mynard, Tassinari, Borges, and others informed the analysis of recordings, data coding, and sequence interpretation. The qualitative focus was motivated by the need to gain a detailed insight into how advising works for individual learners—insight that deepens and better explains existing findings based on standard course evaluation questionnaires and surveys of advising benefits. Three key findings emerge from the cross-case analysis. The first concerns support for learner autonomy: advising in the course offers individualized support, and each case focuses on different core aspects of learner autonomy. The dynamics of the sessions and their relationship to self-directed learning also differ. Advising sessions influence learners' self-directed learning in various ways; some impacts are nonlinear, complex, and not directly perceived by the learners. The second finding explains how advising strategies function: these are selected reactively, based on the individual needs of students and the specific situation. The level of directiveness varies, and the strategies evolve and complement one another over the course of advising. The same strategy may also lead to different outcomes depending on other factors influencing the advising system at that moment. The third finding concerns problematic moments within advising sessions: the dynamics of the advising process may be disrupted by several factors. It is the advisor’s task to notice these in time, choose appropriate interventions, and enable learners to participate effectively in reflective dialogue. The outcomes of the research include recommendations for further study and advising practice, a concrete practical outcome is a set of training materials for the development of advising skills.