Voice actor Peter Robbins has appeared in court to admit threatening and stalking his former lover and a cosmetic surgeon. The 56 year old, who voiced the character of Charlie Brown in the original Peanuts TV series, was charged with making criminal threats and stalking following a bitter dispute with his ex-girlfriend, Shawna Kern, and the doctor who performed a breast augmentation on her. Robbins is said to have turned nasty after the couple split, and demanded a refund on the money he paid for the operation. He appeared in court in January (13) to deny the charges, but during a hearing in San Diego, California on Wednesday (10Apr13), he changed his plea to guilty. Robbins is due in court for sentencing next month (May13) and faces up to three years in prison.