An Indigenous girl who was racially abused as she lined up for a Frozen movie event in Melbourne has received a special message from her idol, Queen Elsa.

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Samara Muir, 3, of Ballarat was waiting with her mother Rachel at a Melbourne shopping centre when she was brought to tears by a series of racist comments.

Ms Muir said a woman in the line remarked; "I don't know what that girl's getting excited about because Elsa isn't black".

The woman's child also said to Samara that "black is ugly".

Ms Muir shared her experience on social media, sparking both outrage and a massive wave of support for Samara.

But now the three-year-old Frozen fan may just have received her most exciting message yet — a video from Queen Elsa herself.

"Hi Samara, I'm Elsa, queen of Arendelle, I've just heard a little bit about you so I wanted to say hi," a Disney World character dressed as Elsa said in a video message.

"I just want to remind you to always be yourself and let it go."

The message was organised by a former Ballarat resident, who is now also an employee at Disney World.

According the local Ballarat newspaper, The Courier, Samara's mouth dropped to the ground when she received the message.

"She kept saying over and over 'She's talking to me.' We were in tears," Ms Muir said.