ESA is launching a new initiative to develop a roadmap for finding Earth-like planets. Searching for rocky planets around other stars, in the hopes of finding an Earth-like world, is a top scientific goal in ESA's Cosmic Vision programme. Achieving this ambition requires a great deal of technological development, and a constant eye on the changes taking place across this fast-moving field of research. To provide an overview of the field and a set of technological milestones that must be achieved before rocky planets can be analysed, ESA has appointed the Exoplanet Roadmap Advisory Team.