18-year-old Hayley is the ultra-liberal daughter of the Smith household. Stan insists on putting her through an airport-style security search every time she enters the house (sure, he loves his little girl, but he doesn't necessarily trust her).

Rachael MacFarlane developed her craft on the Emmy-winning FOX animated series FAMILY GUY. Her numerous voices on FAMILY GUY include "Olivia," "Maid Madeline" and "Jennifer The Cult Girl." In "Stewie Griffin: The Untold Story," she voiced "Britney Spears" and "Katie Couric." MacFarlane's other voiceover credits include "Dr. Samantha Rhodes" in "Lego Atlantis," "Mindy" and "Eris" on "The Grim Adventures of Billy and Mandy" and "Underfist," "Numbah 362" on "Code Name: Kids Next Door," "Scooby Doo," "Static Shock," "Dexter's Laboratory," "The Powerpuff Girls," "Samurai Jack," "Johnny Bravo" and "Megas XLR."

MacFarlane attended the Boston Conservatory. She lives in Los Angeles with her husband and daughter.