Rachael MacFarlane

The younger sister (by three years) of Family Guy and American Dad creator Seth MacFarlane, Rachael MacFarlane provided a number of voices on her famous sibling's animated sitcom Family Guy, and the voice of Hayley Smith, a regular character on American Dad. Additional achievements of hers include voices for Johnny Bravo, Dexter's Laboratory, and The Grim Adventures of Billy & Mandy. ~ Nathan Southern, All Movie Guide