Arnold Schwarzenegger’s son is the most private among the rest of his kids, but recent photos show what he has been up to these days. Paparazzi caught the 25-year-old in Los Angeles after his workout, and he looks amazing!Christopher is the youngest spawn of the former Governor of California and Maria Shriver. He was born on September 27, 1997, and grew up with his older siblings, Katherine,Christina, and Patrick Schwarzenegger.