Kathy Hillis was a HouseGuest on Big Brother 12. Despite being a police officer, Kathy's physical abilities were often made fun of by the other HouseGuests. After Matt Hoffman used his Diamond Power of Veto to save himself, he chose Kathy to be his replacement. She was evicted by a vote of 5–0, placing eighth and becoming the second member of the Jury.
•Kathy was the oldest HouseGuest of her season.
•Kathy was the first police officer to appear on the show, the second being Derrick Levasseur.
•She was the first female HouseGuest to be "zinged" by Zingbot.
•She was the first HouseGuest to participate in something that is similar to their real-life job, which was the luxury competition Big Brother Cop Course. The second was John McGuire; when he was a Have-Not he slept in a dentist's chair instead of a regular bed.
•Kathy claimed she kept her morals while in the house, being one of the few HouseGuests known to do such a thing.
•Zach Rance called out Rachel Reilly for her fight with Kathy in an interview the two of them had.
•In her profile for Big Brother 14, Britney Haynes said her favorite moment was when Kathy gotten stuck in the Caramel.