Carlos Rivas (born, Oscar Weber, February 16, 1925 June 16, 2003) was an American actor, best remembered as Lun Tha in The King and I (1956), Dirty Bob in True Grit (1969), and Hernandez in Topaz (1969). Rivas was born in El Paso, Texas, to a German father and Mexican mother. English was his first language.