For an entire generation, the voice of Peter Robbins is about as iconic as they come. The former child actor came to prominence in the late 1960s, when he provided the voice for the character of Charlie Brown in numerous Peanuts films and television specials, including holiday favorites like A Charlie Brown Christmas and It’s the Great Pumpkin, Charlie Brown. But now, instead of suffering through gibberish elementary school lectures, pining for the red-haired girl, or missing the football at kicking practice with Lucy van Pelt, Robbins is contending with more serious issues.

Robbins, now 56, plead guilty last month to charges of stalking and threatening his ex-girlfriend and her plastic surgeon. The actor was sentenced today to a year in prison, but due to reports of good behavior and accumulated credits from time spent behind bars while waiting for sentencing, Robbins will be allowed to log his jail time in rehab treatment instead.

According to E! Online and the San Diego County District Attorney’s Office, Robbins will be required to spend no less than eight months in rehabilitation treatment. The altered prison sentence also includes a five-year probation period, a 10-year restraining order to keep him away from his ex, and a $15-thousand restitution charge to cover his doctor’s fees.

An article in Huffington Post notes that Robbins could spend up to four years in prison if he violates the terms of his sentence in any way.

Judge Dwayne Moring cautioned Robbins with a statement of “Don’t be a blockhead”–a famous Peanuts-ism–as he passed down the order.

Prosecutors claim that the actor had called his ex up to 37 times in a single 24-hour period, threatening bodily harm and murder to her and her son and demanding the return of his car and his dog. In addition, Robbins is said to have stalked his ex’s plastic surgeon, made frequent calls to her office, and left threatening notes, all to such an extent that the woman moved into a hotel room and sought armed bodyguards in pursuit of her own safety.

Huff Post also relates that Robbins showed genuine remorse for his actions in the court room, fighting back tears and telling the judge that “treatment for alcoholism and addiction to prescription medications would be a first step toward becoming ‘the fun-loving person’ he was.”  Robbins also apologized to his ex and her surgeon for his frightening actions.