Facebook chief executive Mark Zuckerberg has today revealed that more than one billion people are actively using Facebook each month, and has rolled out an ad campaign to celebrate the achievement.
The number is double the 500 million users the company hit in 2010, and significantly higher than the 100 million user mark of 2008.
Zuckerberg said on his Facebook page: "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 honor of serving you.
"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 company has launched an ad campaign through Wieden + Kennedy to celebrate.
Zuckerberg said of the campaign: "For the first time in our history, we've made a brand video to express what our place is on this earth.
"We believe that the need to open up and connect is what makes us human. It's what brings us together. It's what brings meaning to our lives.
"Facebook isn't the first thing people have made to help us connect. We belong to a rich tradition of people making things that bring us together.
"Today, we honor this tradition."
Facebook has been under considerable pressure following the company's initial public offering earlier in the year, as investors question how the business will create new revenue streams, particularly in the mobile space.
Facebook's share price has been tumbling since its initial public offering opening price of US$38 in May.
Late last month, financial journal Barron's argued the company was overvalued, and only worth around US$15 a share.
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