His Majesty, the American is a 1919 American silent comedy film directed by Joseph Henabery and starring Douglas Fairbanks. It was the first film produced for distribution by United Artists, and was released in the U.K. as One of the Blood. Prints exist in the film holdings of Cohen Media Group (Raymond Rohauer collection) [a 35mm positive]; in the film holdings of EmGee Film Library [a 16mm reduction positive]; and in private film collections [a 16mm reduction positives].

This was one of Boris Karloff's earliest acting jobs in the movie industry. He can be spotted in the scene where Sarzeau's men storm the inn where Bill Brooks is staying. Karloff is at the front of the crowd, wearing a thick mustache and a cloth cap. He can also be seen on the staircase as the men race up the stairs to Bill Brooks's room.