From lively playgrounds to busy classrooms, children communication usually happens in noisy settings. Perceiving speech in noisy is a complex task that requires an adequate combination of sensory perception and cognitive processing. In spite of their functionally mature auditory system, school-age children’s perception of speech in noise remains poorer than adults’. The main aim of this study was to better understand the mechanisms underlying this protracted auditory development. In particular, we focused on auditory selective attention and its relationship with speech perception in noise throughout development. Participants were included in one of three groups based on their age: 8-11 years (children, n = 7); 12-18 years (adolescents, n = 37); 18+ years (adults n = 43). Participants were presented a selective attention task (Woods and McDermott, 2015, doi:10.1016/j.cub.2015.07.043), as well as several speech perception tasks (in quiet, in speech-shaped noise and in the presence of one-talker interferer). Data are still being collected in the children group. So far, results indicate that adolescents remain poorer than adults at selectively focusing on a target auditory stream, with or without additional interfering stream. Additionally, our results confirm the protracted development of speech perception in noise until late adolescence. Interestingly, across all participants, there is a significant relationship between stream segregation and speech perception in noise. This is in line with previous studies showing that auditory scene analysis relies on selective auditory attention, an ability that develops until late childhood/adolescence.