29. Mackenzie Rosman
For several years, Mackenzie Rosman portrayed character Ruthie Camden in the long-running hit series 7th Heaven. After practically growing up on the show, the actress was out of steam. Although she picked up a couple of minor roles afterward, she has found satisfaction in endeavors outside acting.
Specifically, Rosman has become something of an active and devout philanthropist. While she has been vocal about her passion for multiple causes, she is most involved as the national honorary chairwoman for Curefinders, a fundraising program that helps children living with cystic fibrosis. Rosman was inspired to pursue this cause after watching her stepsister endure the disease. Because of her hard work, she was recognized by Teen People as one of the “20 Teens Who Will Change the World.”