Samuel Friedrich Diez ( 19 December 1803 – 11 March 1873) was a German portraitist and court official. He served as court painter to Georg II, Duke of Saxe-Meiningen. An influential artist in royal courts across Europe, he was made Honorary Designer of His Majesty The King of the Belgians by Leopold I of Belgium. Diez also served in a political role at court, and was appointed as a Privy Councillor by Heinrich LXVII, Prince Reuss Younger Line.