The man best known for being the voice of Charlie Brown is facing up to three years in prison.

Peter Robbins pleaded guilty to making criminal threats and stalking.

He made death threats to his ex-girlfriend, her son, and her plastic surgeon.

She said that he called her a dozen times a day and threatened to kill her and her son if he did return his car and dog.  Prosecutors say he also threatened her plastic surgeon, wanting a refund for breast enhancement surgery for which he paid.

Robbins played the voice of Peanuts character Charlie Brown in "A Charlie Brown Christmas" (1965) and "It's the Great Pumpkin, Charlie Brown" from 1966.

Series creator Charles M. Schulz, who passed away in 2000, said that Charlie Brown is "a caricature of the average person."  The voice behind him will be sentenced in a California court in May.