The left looks slightly more like Chris O Donell and indeed is the real Leo. However, his face shape when younger is almost much rounder appearing and not as trilateral, heart shaped on the right. The slightest change of shape and he doesn’t look like himself as much. It all comes down to the shape. For more look at the changes below and see if you can see the change of shape from face to face.
Leonardo DiCaprio Unknown Mark Walberg-Yes, again in this case Leo is in the middle. But, in this instance his face shape appears wider, much more heart-square like Walberg. This is just another example. Here are some more below of Leo next to others-see i you can spot the change, differences in shape and who’s who. For more, click each one.
Leonardo DiCaprio Unknown Max Theriot (All are somewhat similar to Chris O Donnell, Chris Pine, Jesse McCartney)