Aside from voice acting, MacFarlane has also been involved in other aspects of animation, such as being a production manager for The Grim Adventures of Billy and Mandy and Welcome to Eltingville. She also wrote an episode of Billy and Mandy, titled "Educating Grim". On September 18, 2012, Rachael followed in her older brother's footsteps and released a big band album entitled Hayley Sings. [1]