With two Oscars, more than $1 billion in box office takings and a Broadway spinoff show in the works, Frozen has quickly cemented itself as a pop cultural phenomenon and an instant Disney classic.

Why has the movie struck such a chord with audiences? According to directors Jennifer Lee and Chris Buck, who are speaking to Digital Spy for the film's DVD and Blu-ray release, 'Let It Go' and the film's music has played a huge part in powering the movie to success.

"When we heard 'Let It Go' we thought it was so great. I had to rewrite the whole movie around it," said Lee. "It was so special to us immediately, and the fact the world has embraced it means everything."

Lee and Buck also discuss Frozen's transition to Broadway, 'Let It Go' with kittens and the sing-along version in the interview above.

Frozen is available now on Blu-ray, DVD and download.

Disney's Frozen pictures

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