This chapter focuses on the role of individual differences in L2 writing. We first outline the theoretical, empirical, and pedagogical relevance of individual factors in L2 writing research. This is followed by a synthesis of key research findings, with a specific focus on such traits as language aptitude, working memory, motivation and L2 future selves, beliefs, self-efficacy, self-regulation and anxiety. We then draw practical implications and provide suggestions for the early-career teachers. As a suggestion for action research, we provide an example of a design of collaborative writing project which focuses on the effects of digital stories on L2 writers’ writing motivation, self-efficacy, self-regulation and anxiety.