Chris Evans aka "Captain America" recently talked to Jimmy Fallon.
Chris is the latest celebrity to join Instagram.
Jimmy asked him what made him join the social media platform.
I caved. I feel like such an old man. You know what it is, I had too many good pics of my dog. I was like, they're being wasted on my phone. I need to put them somewhere.
Chris now has over 3 million followers. He has 4 posts; 2 are of his dog.
Do you remember why you joined any of the social media platforms?
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