A billion Facebook and YouTube users will be able to watch Sydney's New Year's Eve fireworks celebrations live on their mobile phones for the first time this year.

The Welcome to Country ceremony, kids' 9pm fireworks and midnight fireworks will all be live streamed on Facebook and YouTube and the City of Sydney's New Year's Eve website.

Billions of Facebook and YouTube users will be able to watch Sydney's New Years Eve firework celebrations live from their mobile phones. Credit:Janie Barrett

The City of Sydney's Lord Mayor Clover Moore said that organisers would be "breaking new ground" this year by streaming the "world's most famous firework show" to an estimated audience of one billion people.

"By making the most of digital technology only available this year, we can put Sydney's New Year's Eve fireworks show in the palm of people's hands around the world - right as it happens," Cr Moore said.