The Terminator showed his softer side with kind words for his 22-year-old son on Instagram as well. "Patrick, I'm so proud of you," Arnold wrote. "You have grown into a great man -- physically and mentally -- and I can't wait to see what you do next. Congratulations. I love you."
Despite having graduated from business school, Patrick is following in his famous father's footsteps with acting roles in Scream Queens and a leading role in the upcoming film, Midnight Sun opposite Bella Thorne.
Arnold and Maria split in 2011, but their divorce has yet to be finalized. The split came in the wake of revelations about Arnold's affair with the couple's long-time housekeeper, Mildred Baena, that resulted in the birth of a son 14 years prior.