Meredith Lynn MacRae (May 30, 1944 – July 14, 2000) was an American actress and singer known for her roles as Sally Morrison on My Three Sons (1963–1965) and as Billie Jo Bradley on Petticoat Junction (1966–1970).
MacRae was born in Houston, Texas, to parents Gordon and Sheila MacRae. Her father was stationed with the Army Air Corps in Houston at the time of her birth. Both of her parents went on to be actors. She is the sister of William Gordon MacRae, Robert Bruce MacRae, and Heather MacRae.
She credited her parents with instilling a proper work ethic in her and for keeping her feet on the ground. She said, “We lived in a modest home in the San Fernando Valley instead of the fashionable Beverly Hills, which the family could have afforded. Mom and Dad didn’t want us to feel superior to the other kids. I had to earn the things I wanted, all the way from dolls to party gowns, by doing chores around the house and taking care of my younger sister and brothers. Lots of kids in my circle automatically got a car when they were 16. Not me. Dad said he would get me a car when I got straight A's two years in a row in school. I slaved away and finally made it. I got the car with the warning that if I didn’t continue with straight A's, it would be taken away.”