This paper examines a sport-based Millennium Volunteers programme that aims to provide training and support for young people to volunteer in their schools and the community. The research set out to describe the psychosocial characteristics, motives and attitudes towards volunteering of young people involved in the programme over a nine-month period. Overall results showed that leadership skills and the range of volunteer motivations increased, while the importance of and attraction to, volunteering also changed over time. Providing a profile of young volunteers and a measure of the impact of their volunteer activity may be of benefit to charities, educators and community administrators who wish to increase interest in, and opportunities for, volunteering by young people. This study demonstrates (a) the advantage of using sport as a vehicle for encouraging pro-social behaviour and citizenship among young people, (b) the positive impact volunteering can have personally on the volunteer, and (c) the potential benefits for the community.