The Prosthetic Head is an embodied conversational agent (ECA) that speaks to the person who interrogates it. The interface is a keyboard and the text box beneath the 5 m high projected head confirms the user’s query. It is a conversational system, that coupled to a human user is capable of some interesting, often appropriate and at times unpredictable exchanges. The Prosthetic Head can generate its own poetry and song-like sounds which are different each time it is asked. As its data base increases and its feedback from the real world increases the artist will no longer be able to take full responsibility for what his Head says.