Who is this famous person?
Rules are that you can ask one question, which must require a yes/no answer, and you can then make a guess. Of course, no question required if you want to make a guess or you know who it is...

Rules are that you can ask one question, which must require a yes/no answer, and you can then make a guess. Of course, no question required if you want to make a guess or you know who it is...