Kristen Bell leaves special message as Princess Anna to girl with brain tumor

A 6-year-old girl diagnosed with an inoperable brain tumor had something smile about after receiving a very special message from Princess Anna of Arendelle.

On June 30, Avery Huffman was diagnosed with Diffuse Intrinsic Pontine Glioma (DIPG), a highly aggressive brain tumor found at the base of the brain.

Since then, her family has been documenting the brave girl's battle against the cancer on Avery's CaringBridge page.

Avery is a big fan of the movie "Frozen" and her favorite character is Anna. The animated character is voiced by Kristen Bell and the actress recently sent a personal audio message to Avery as Princess Anna.

In the voicemail, Bell says, "My sister Elsa says she's heard you have been such a good girl and you have been so brave, she has decided to crown you as an honorary princess of Arendelle!"

Avery's father, Brandon, posted a video of Avery's reaction to the message on YouTube and it's a priceless moment that will never be forgotten.

"I've watched the video of her hearing from Anna/Kristen Bell, around 50 times, just to watch her face light up, and to hear her giggle and see her smile," Avery's parents wrote on the CaringBridge page.

You can follow Avery's journey on Twitter using the hashtag #AveryStrong.