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So if you have any questions about the cocktail dress code, read on for GLAMOURs definitive guide of what to wear (and what you should avoid)

Brown debuted her freshly dyed platinum blonde hair in a sleek bun, with a soft strand framing her face

Men's Brown leather sneakers are workhorses for your closet

In a well-meaning attempt to clarify that ironically complicates matters further, Debretts Guide for the Modern Gentleman draws a distinction between formal smart casual and informal smart casual

Double down on the romantic bohemian look by styling this statement boho gown with a rad rancher hat and these dainty floral hair pins