PRISON BREAK star Wentworth Miller is a hit behind bars - because signed photos of the hunk can be used as prized trade offs. The 34-year-old admits he receives a lot of fanmail from real-life criminals, who hope Miller will reply with an autographed picture they can swap in jail for restricted goods. He says, "Apparently, a signed head shot from one of the Prison Break cast members will get you a packet of cigarettes on the black market behind bars!"