Natalie Carroll was a houseguest in Big Brother 5. As a part of Project DNA, she switched places in the Big Brother House with her identical twin sister Adria Klein for the first four weeks, and because they pulled off their deception, Natalie was let into the house to play her own game. After Natalie and her sister turned on the Pinky Swear Alliance, both were nominated against each other. When Adria won the POV, her fate was sealed and she was evicted in a 4 to 1 vote, only receiving the vote of her sister, becoming the second member of the jury
•Natalie was the first HouseGuest to officially enter the Big Brother House after the season began.
•She was then joined by Julia Nolan in Big Brother 17.
•Natalie and Adria along with Michael Ellis and Nakomis Dedmon are the first pair of relatives to compete on Big Brother.
•They would later be followed by Dick and Daniele Donato, Rachel Reilly and Elissa Slater, Liz and Julia Nolan, Cody and Paulie Calafiore, Tiffany and Vanessa Rousso and Alex and Morgan Willett.
•During the Week 5 HOH competition, Natalie infamously cheated when Julie Chen had asked a true/false question and got it wrong, but Julie had mistakenly forgot to tell her she had been eliminated, thus she reset her answer and continued playing. She was eventually eliminated on the next question.