Sofia the First Sofia the First

For Grey's Anatomy star Sara Ramirez, working on the Disney Junior movie Sofia the First: Once Upon a Princess was a no-brainer.

"I grew up watching animation [and] this was kind of like a dream come true," Ramirez told

Exclusive: Disney Channel to premiere new princess franchise Sofia the First

The movie is about a young girl named Sofia (voiced by Modern Family's Ariel Winter) who suddenly becomes a princess when her mother Miranda (voiced by Ramirez) marries the king. But unlike the typical fairy tale that includes mean stepsisters and stepmothers, this story is about learning to fit in and being kind.

"What's really behind it is that you can have all the material things in the world and can sit on a throne, but what really matters is being kind, compassionate, respectful and honest," Ramirez says. "The king has two other kids from a previous relationship so there's a blended family story, which I really love. And for once the stepmother is not an evil woman! She's actually quite helpful and wants to empower her daughter to do good things and be a kind person in the world."

Sofia the First premieres on Sunday, Nov. 18 at 7/6c on the Disney Channel.

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