Rachel Eileen Reilly Villegas (born October 16, 1984) is an American television personality and actress. After appearing as a houseguest on the twelfth season of the American edition of the reality series Big Brother in 2010, she returned for the thirteenth season in 2011, which she went on to win. She later returned as a houseguest on the twenty-seventh season in 2025.

She has also participated in two seasons of The Amazing Race with her husband Brendon Villegas, placing third both occasions. She participated in a third season with her sister Elissa Slater, placing seventh. She has also won Celebrity Fear Factor and Snake in the Grass.