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.
Dan Worth is the news editor for V3 having first joined the site as a reporter in November 2009. He specialises in a raft of areas including fixed and mobile telecoms, data protection, social media and government IT. Before joining V3 Dan covered communications technology, data handling and resilience in the emergency services sector on the BAPCO Journal.