She looks smashing!
Chelsy usually has trouble with formal wear (the suit she wore the last time she attended a medal ceremony with Harry looked horrible cheap) but this time she nailed it.
This pictures are great because the chemistry between these two is so obvious (unlike that other geriatric couple I won't name). Chelsy isn't the prettiest girl (in all honesty she's really average) but she's so brimming with personality and joie de vivre that it's easy to see why Harry, who could have pretty much any girl, fell for her.