Photo via Twitter/Barack Obama
Photo via Twitter/Barack Obama

Holy cow, has it been that long already?

Twitter is 9 years old today. And to celebrate, the social media giant has put up a blog post with its greatest hits, including the very first tweet from co-founder Jack Dorsey:

Several other milestones abound, including the very first hashtag, significant news announcements and entertainment tweets, like this one which answered the question: How many A-List actors can you fit into one shot?

And this oldie but goodie:

Happy birthday, Twitter!

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