Yep, Harry suffered a nipple slip and we can't say we're surprised – his black shirt was unbuttoned so far down, it was bound to happen.
Harry's nip slip was spotted as he left the event with pal Ed Sheeran and his girlfriend, though in most pics, Harry seems pretty put-together, running his hands through his hair while fans swarm to him.
He does realize that shirt has more buttons, doesn't he? Ah well. Nipples happen, now don't they? At least he kept things under wraps when he met the Duke and Duchess.