In this chapter, I consider how the GPT has changed over time in terms of its changing demographic base. In other words, who are the GPT? At the elite level, I examine what kinds of people have led and organised the party, as well as who the party has tended to nominate in elections. I will try to show the changing human face of the GPT by giving readers brief introductions to some of the key party figures for each of the time periods. However, this chapter is also interested in the kind of people that have supported the party as members, activists and voters. Has the sociological background of Green Party voters changed over time, and is its support base similar to that found for Green Parties in other countries?