Jesse Eisenberg and Michael Cera
If there are two actors who look the same but have completely different personalities, they would be Jesse Eisenberg and Michael Cera. People somehow mistake one for the other, even though Jesse clearly has curly hair and Michael… well, also has curly hair if he grows it out.
The two randomly ran into each other back in 2014, and they spoke about their experiences of being mistaken for the other. Jesse claimed that he used to get called Michael at least once a day. What’s funny is that if people don’t mistake Michael for Jesse, they mistake him for Jon Heder, the star of Napoleon Dynamite.