no, when you call someone in prison your calls get diverted to the police. The prison staff will be able to tell you how and when you may contact prisoners. Usually contact with prisoners is limited to legal advisors and the prisoners immediate family.
Prisoners become famous for what they go to prison for, what they do in prison, and/or what they do when they get out. Also prisoners become famous because they may be or be aquainted with someone famous, rich, powerful or infamous