Complex sentence: Rachael Ann MacFarlane (born March 21,1976) is an American voice actress and singer best known as the voice of character Hayley Smith on the animated television show "American Dad!", which was created by her brother Seth MacFarlane.
Split into simpler sentences: Rachael Ann MacFarlane (born March 21,1976) is an American voice actress and singer. She is best known as the voice of character Hayley Smith on the animated television show "American Dad!", which was created by her brother Seth MacFarlane.