Norberto Kerner (1929-1999) was a Chilean-born character actor whose career was spent primarily in New York City. He played Mr. Ortiz, a recurring guest character in multiple Sesame Street episodes: two in 1978, a 1981 episode and a few in the 1982-1983 season. In 1979, he also supplied the voice of Osvaldo, el Gruñón in episode 1316.
Kerner played in Broadway productions My Old Friends (1979) and Chronicle of a Death Foretold (1995), originating the role of Xius, a widower. Off-Broadway, his credits include Don Juan of Seville (1989), and La Carreta (The Oxcart, 1992); of the latter, The New York Times praised Kerner for his performance "as a grandfather who embodies the values [playwright] Marques cherished most."