This Ed Westwick photo contains
boater, leghorn, panama, panama hat, sailor, skimmer, straw hat, fedora, felt hat, homburg, stetson, trilby, dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper, and beaver.
There might also be
pith hat, pith helmet, sun helmet, topee, topi, green beret, special forces, elite soldier, cavalier hat, and slouch hat.