(Kevin Systrom/Instagram)

The honor of being in the first Instagram snap, which was posted four years ago today, went to co-founder Kevin Systrom's dog.

The pet pooch is so cute that she didn't even need one of Instagram's now ubiquitous filters.

At the time, the photo sharing network hadn't gone public and went by a different moniker: Codename, according to a post on the company's website from two years ago.

Instagram launched to the public in October 2010 and now boasts more than 200 million active members per month, according to the company.

An average of 60 million photos are uploaded every day, while more than 20 billion snaps - many of which likely include elaborate meals and sunsets - have been shared.

Then there's the reported $1 billion that Facebook paid for Instagram in 2012.

And to think: It all started with an idea and an adorable dog.