"Ambition," the streaming service captioned the image Tuesday of Menzies who is seen as Philip wearing a suit filled with honorary medals.
Menzies, best known for starring as Edmure Tully in "Game of Thrones" and as Frank Randall and Black Jack Randall in "Outlander," is taking over the role of Philip from Matt Smith who portrayed the British royal in "The Crown's" first two seasons.
The casting change takes place as the series was designed to feature royal characters as they age.
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