Emma Corrin and Harry Styles
Emma now has a LOT of experience playing women who married men that are in love with someone else. Her outfit here is actually quite cute and bright and fun, and I assume reflects her character's happiness in a way that will not last.
If you told me this was just what Harry Styles himself wears for an afternoon on the beach, I would believe you. It feels true.
This appears to be them after they're done or between shots, trying to warm up on a chilly day, and it's endearing to see him hugging her while SHE hugs a hot water bottle.
This is Harry with, I assume, the actor playing his character's truest love. His name is David Dawson. They don't look particularly alike in real life, from what I can tell, but in this shot it's almost as if Harry has fallen in love with himself.
In case you were curious whether Haz can pull off the hat. It sits on him... well, like a costume, frankly. Like he's performing a cheeky Halloween prank. I assume when he's in motion and saying lines, rather than pretending not to notice the paparazzi, it works.