Carl Henry Vogt (February 19, 1895 – May 12, 1956), known professionally as Louis Calhern, was an American stage and screen actor. For portraying Oliver Wendell Holmes in the film The Magnificent Yankee (1950), he was nominated for an Academy Award for Best Actor. Calhern began working in silent films for director Lois Weber in the early 1920s; the most notable being The Blot in 1921. A 1921 newspaper article commented, "The new arrival in stardom is Louis Calhern, who, until Miss Weber engaged him to enact the leading male role in What's Worth While?, had been playing leads in the Morosco Stock company of Los Angeles."