VIDEO: 100 million new users sign up to Instagram in nine-month period

Photo-sharing app Instagram has seen 100 million users sign up within nine months, taking it to 400 million worldwide.

The San Francisco-based firm, bought by Facebook in 2012 for $1 billion (€895.6m), said in a blog post it was “thrilled” by the milestone.

Since its creation around five years ago, the site has attracted plenty of celebrity names, including David Beckham and Caitlyn Jenner, and sees more than 80 million images shared every day.