A picture is worth a thousand words, but a popular photo-sharing app is worth far more: Facebook announced it is purchasing Instagram for $1 billion.

To put the sale in perspective, the Wall Street Journal's Dennis K. Berman tweeted: "Remember this day. 551-day-old Instagram is worth $1 billion. 116-year-old New York Times Co.: $967 million."

The purchase of the San Francisco-based photo-sharing app is the largest financial acquisition in Facebook's history and is being made in cash. The deal will be completed by June, according to the AP.

"This is an important milestone for Facebook because it's the first time we've ever acquired a product and company with so many users," CEO Mark Zuckerberg wrote on his Facebook page. "We don't plan on doing many more of these, if any at all." In a move to reassure Instagram's growing audience of users, Facebook announced that it will continue to let Instagram operate independently. However, Facebook is hiring Instagram's 10 employees.