[[quoteright:227:https://static.tvtropes.org/pmwiki/pub/images/rm_0.jpg]]
[[caption-width-right:227:[[WesternAnimation/FamilyGuy Peter Griffin's]] kid sister]]

Rachael [=MacFarlane=], a voice actress born on March 21, 1976 in Kent, Connecticut, is best known as the voice of Hayley Smith on ''WesternAnimation/AmericanDad'', as well doing voice work on shows such as ''WesternAnimation/FamilyGuy'', ''WesternAnimation/TheBatman'', ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'', ''WesternAnimation/SamuraiJack'', ''WesternAnimation/DextersLaboratory'', ''WesternAnimation/ThePowerpuffGirls'', ''WesternAnimation/JohnnyBravo'', ''WesternAnimation/CodenameKidsNextDoor'', ''WesternAnimation/SofiaTheFirst'', ''WesternAnimation/TheOwlHouse'' and ''Series/TheOrville'', and that's just the stuff you've heard of. She's also the sister of Creator/SethMacFarlane.

She [[http://www.newnownext.com/rachael-macfarlane-childrens-book-eleanor-wyatt/11/2018/?xrs=synd_twitter_logo wrote]] a children's book with her husband Spencer Laudiero as the illustrator.

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!!This actress provides examples of:
* BrotherSisterTeam: She did numerous voices on her brother's shows, especially on ''WesternAnimation/AmericanDad''.
* CrossdressingVoices: She voiced Billy Batson in ''WesternAnimation/SupermanBatmanPublicEnemies''.
* TheDanza: In ''WesternAnimation/CodenameKidsNextDoor'', she voices Numbuh 362, whose real name is Rachel.
* FakeBrit: As Eris on ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'', Cedric's sister Cordelia as well as Elfabetty on ''WesternAnimation/SofiaTheFirst'', Madame Lucille on ''WesternAnimation/FancyNancy'', and Odalia Blight on ''WesternAnimation/TheOwlHouse''.
* FakeNationality: She provides a Greek accent for Artemiz in the Lego ''WebAnimation/DCSuperHeroGirls'' projects.
* IncestuousCasting:
** On ''Family Guy'', she voiced Stewie's love interest, Olivia. Stewie, as most of you know, is voiced by her brother [[Creator/SethMacFarlane Seth]]. Also Quagmire's abusive girlfriend, with Quagmire being voiced by Seth too.
** In ''American Dad'', there was an episode where Hayley had a brief fling with Stan's body double (which was borderline incestuous in-universe as the real Stan is Hayley's father), also voiced by Seth. There was also an episode where Roger (again, Seth) became romantically infatuated with Hayley.
* ManOfAThousandVoices: While not to the extent of her brother, she's voiced quite a few characters on many shows.
* RealLifeRelative: Her character on ''WesternAnimation/AmericanDad'' is the daughter of the main character, Stan Smith, voiced by her brother.
* WrittenByCastMember: She wrote a few early episodes of ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'', which is fitting since she voices both Eris and Mindy.
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