But changing people's perception is powerful all by itself, Cevallos said, adding that people find it surprising that many people with Down syndrome live independently and have boyfriends or girlfriends just like anyone else.
"It's helpful in terms of getting an accurate picture out there," Cevallos said. "There's a lot of old stereotypes…A lot of people [with Down syndrome] are going to college and I don't think the average person understands that."
In fact, Potter attends theater classes at a community college. Jamie Brewer, who has Down syndrome and plays Adelaide on American Horror Story, said she is getting her Bachelor of Fine Arts degree at a community college in Southern California where she lives. Just before talking to ABCNews.com, she was attending a math class.
Brewer, 27, said she's proud of her acting, but being a role model for people with Down syndrome is just as important.
"The biggest thing is advocacy," Brewer said. "You can really step up and say, 'Hey, this is who I am. I have these great talents,' and I want to be able to show that."