When he's not playing the super-serious Bucky Barnes, aka The Winter Soldier, Sebastian can be found posting a bunch of silly yet adorable content on Instagram, like this one:
Or this one:
Keep reading for 14 other times Sebastian Stan was a big ol' goofball on Instagram and we absolutely loved him for it.
1.When he did this belly flop onto a red Austin-Healey 3000:
2.When he nailed the perfect photobomb:
3.When he posted this aged snap of himself in hair and makeup:
4.When he shouted at the beach...
5....and in the streets:
6.When he took the New York City subway and made sure to fit in with the rest of us weirdos:
7.When he met Lou Ferrigno, the legendary actor who played the original Hulk in the '70s, and didn't pass up the opportunity to flex for a photo:
8.When he shared this behind-the-scenes look at his sous chef skills:
9.When his The Martian costars got in on the silliness and struck a pose in their makeshift spacecraft:
10.When he showed us this hilarious shot of his wig cap blown back:
11.When he suited up for a flight during the height of the pandemic:
12.When he uploaded this caught-off-guard photo of himself catching some z's:
13.When he shared yet another hairstyling selfie because it takes a village to look this good:
14.And lastly, when he posted this very cheeky photo to promote his film, Monday: