Facebook has passed the one billion user milestone underlining the dominance of the site in the social media market.
Founder and chief executive Mark Zuckerberg revealed the figure in a post on the site on Thursday morning.
"This morning, there are more than one billion people using Facebook actively each month. If you're reading this: thank you for giving me and my little team the honour of serving you," he said.
"Helping a billion people connect is amazing, humbling and by far the thing I am most proud of in my life.
"I am committed to working every day to make Facebook better for you, and hopefully together one day we will be able to connect the rest of the world too."
The firm revealed the figure was officially hit on 14 September, and that to date some 219 billion photos have been uploaded to the site.
The announcement is a significant milestone in the company's history but comes as it struggles to reignite early fervour around the firm after a disastrous flotation on the stock market.
Much of its initial value has been wiped off after the share price plunged in opening weeks due to concerns around its mobile performance and rumours of alleged insider knowledge being given to banks ahead of the launch.
Earlier this year, the firm revealed it had passed 900 million members, underlining the speed of its growth, although almost 100 million of the profiles were revealed to be a fake in a later filing by then firm.
It's not clear from the update from Zuckerberg if the one billion figure includes these accounts or how active the entire user base on the site really is.
Small Texas cable firm alleges foul play
Facebook will join fores with UK NGOs to tackle hate speech on the social network
A survey of local authorities has found that they face challenges in the areas of data, compliance and mobility.
More than 800,000 home users could be affected