A mother has shared the moment her deaf baby daughter heard her voice for the first time.

Charly Keane was born severely deaf in August 2017.

Her parents, Christy and Daniel, managed to get a hearing aid for baby Charly and shared with the world the moment she heard her mum's voice for the very first time.

The video, showing the baby's heartwarming reaction, was shared earlier this week and has since gone viral.

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"We had our miracle moment that I have been praying for when Char got her hearing aids today," Christy Keane posted on Facebook.

"We didn't think she would hear anything so this was more incredible than I can put in to words!"

The video has been video more than 15 million times since it was first uploaded to Facebook on October 13. It also has more than four million views on YouTube.

It shows baby Charly visibly emotional while being held by her mother who says "hi" and "I love you".

The parents are now going to start working with a speech therapist so that Charly can learn to talk.