Absolutely!! Personally, I prefer a long dress------I guess I'm reliving my prom days a long time ago!! There is a little bit of everything, and everything works. Some pantsuits are very formal, and if your wife's isn't, it can be dressed up to look formal with heels and accessories. It is fun for me to dress for formal night, a nice part of the cruise experience! Whatever she is comfortable with is what she should wear............it is your vacation and you shouldn't have to worry about what to wear. Just relax and enjoy!!