Van Sloan made his Broadway debut in a 1919 play entitled The Unknown Purple.
Van Sloan is buried in the Boehm Cemetary in Montgomery County, Pennsylvania.
Van Sloan made his movie debut in a 1916 silent film. Dracula was his second film.
Van Sloan was the only original cast member of Dracula to reprise his role in the 1936 sequel, Dracula's Daughter.
Besides star Bela Lugosi, Van Sloan was the only actor from the Broadway production of Dracula to reprise his role in the movie.