Written by CNN Staff

An audience with the Queen of England is an important occasion for anyone, but when you're part of the entourage accompanying the leader of the free world on an official state visit, the stakes are even higher.

A significant amount of planning will have gone into the fashion worn by all, including President Donald Trump and First Lady Melania Trump and the rest of the US entourage -- as well as members of the monarchy -- during this trip. There's royal protocol to follow, the unpredictable British weather to consider and a number of events and public engagements of varying degrees of formality to navigate.

Look through the gallery above to see their most memorable looks.