In the first Kharis film, The Mummy's Hand (1940), the character was played by Western-film actor Tom Tyler, while the three subsequent films, The Mummy's Tomb (1942), The Mummy's Ghost (1944), and The Mummy's Curse (also 1944), starred Lon Chaney Jr. in the role.
The character of Kharis was played by different actors in the first four "Mummy" films, with Tom Tyler appearing in the initial film and Lon Chaney Jr. taking over for the subsequent three.