Will Arnett voices BoJack. BoJack was once a star in the hit family sitcom "Horsehole" in the 1990s, but now he is no longer as popular as he used to be. BoJack, who has fallen into a quagmire of self-destruction, drinking and being ignored, begins to think about the meaning of life. Now, with the help of his human partner Todd (voiced by Aaron Paul) and his agent and ex-lover Princess Carolyn (voiced by Amy Sedaris), BoJack is ready to make a comeback...