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.
Name: Kathy Hillis Age: 40 Current Residence: Texarkana, AR Occupation: Deputy Sheriff - Sergeant Three adjectives that describe you: Tenacious, passionate and fun-loving (silly) Favorite activities: My favorite activities include canoeing, riding 4-wheelers, mudding, street racing (at work in my patrol car... Shhhh!), gardening, exercising, target shooting and riding horses. Also, shopping, shopping and shopping. What do you think will be the most difficult part about living inside the Big Brother house: I know the most difficult part of living in the house would be missing my family. On top of that I am a TV and telephone addict so no contact with friends will be hard too. Strategy for winning Big Brother: I'm going to be myself and have FUN! My strategy will be decided on a daily basis. What types of people would you NOT choose to live with you in the house: All Women!!!! Which past Big Brother cast member did you like most or least: I liked Chima the least. She disrespected the game! What are you afraid of: Heights and SNAKES! What is the accomplishment you are most proud of: Surviving ovarian cancer Finish this sentence: "My life's motto is:" Never give up, never give in, and never use the word defeat. Use words like hope, believe, faith and victory. Is there anything else you want the fans to know about yourself: When I was undergoing Chemo one night I vowed to my Grandma that when I got better I would apply for Big Brother. I have loved the show ever since and can't wait to be a part of it.
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.