Notice how these are popular actresses? (Obviously) Lots of hate about Kristen Stewart, but she is a pretty descant actress it's just that the Twilight movies weren't as good writing as Harry Potter or The Hunger Games. Kristen Stewart is just doing her job as an actor like the rest of them.
honestly stop hating on Kristin Stewart. Yes, she smiles. Yes, she is happy. And no, she's not a terrible actress. She was only playing her part as her character. The person she is fitted to portray does not reflect on the actual person she is.