Frozen director Jennifer Lee has praised Kristen Bell for her performance and likened the star to her character Anna.
Speaking about the 33-year-old actress to Empireonline.com Lee said, "She came in to audition and she set the bar so high. She has a warmth to her and also a beautiful singing voice, which a lot of people don't realise.
"She's so funny and so smart, and there's so much of her in Anna, and like us, she wanted to create a heroine who's flawed and goofy and yet who's still inspirational. She was a great partner. And the same with Jonathan Groff. They both really gave us the character's voice. I found I could write the roles much more easily when they were cast."
Frozen was named Best Animated Picture at this year's Oscars and also took home the gong for Best Original Song for Let It Go.