The movie "My Sister's Keeper" premiered on Manhattan's Upper West Side this week. The movie brings to life the difficult choices a family must make when faced with a medical crisis.

Cameron Diaz stars as the mom.

George Whipple: I think of you as a goddess. How is it playing a mother on the big screen?

Diaz: Well, I think that mothers are goddesses. So, thank you.

The movie features Abigail Breslin and Sofia Vasililieva as the two siblings that must help each other in order to survive.

Whipple: Would you give up a kidney or bone marrow for a relative?

Vasililieva: You know, until I'm in that situation, I really can't say. But I believe that I would go to the end of the earth for my family, for the people that I love. So, now I would say that I would.

Diaz says that the story won’t leave a dry eye in the theater.

"It's a film that's very honest, very truthful," she said. "It's wonderful because Nick Cassavetes is our director. He's so wonderful. He kept it really honest. It's very touching. There's not a false note in this film. It's about family that's being torn apart and, much as it is about life and death, it's about a family living together and really trying to make things okay. I think that's why so many people relate to it, because there's so much to relate to in it.

The movie is based on a book by Jodi Picoult.

"It came from a personal story, as well as a political one," said the author. "I really wanted to bring stem-cell research down to a personal level, instead of having it argued in politics, and it came from a personal experience I had with a child who had multiple surgeries for tumors in his ears, so I know what it was like to be with a child over and over and have it feel comfortable."

The film is in the theaters this weekend.