The Duke of Cambridge will host his first investiture ceremony later as the scope of his royal duties widens.
The Duke has recently given up operational duties with the RAF after serving three years as a search and rescue helicopter pilot in North Wales.
He is now in a "transitional" year, sources have said, and is considering options for his "public service".
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The former reality TV star will follow in the footsteps of Abraham Lincoln and John F Kennedy when he takes his oath later on Friday.
The President-elect's comments on Twitter will come under even closer scrutiny when he takes office on Friday.
Cold, quiet and calm