Could someone look happy but really they're depressed?

Yes, it is possible for someone to appear happy on the outside while feeling depressed internally. Many people mask their emotions due to societal expectations or fear of judgment, often using smiles and laughter as a façade to hide their true feelings. This phenomenon is sometimes referred to as "smiling depression," where individuals may struggle silently despite outward appearances. It's important to approach such situations with empathy and understanding, recognizing that not all emotional struggles are visible.