On Saturday, the Terminator star posted a photo on Instagram of himself taking Baena's hand as they stand on the hills of Pepperdine, the private university in Malibu, California. The 21-year-old proudly sports his cap and gown while standing alongside his father.
"Congratulations Joseph! Four years of hard work studying business at Pepperdine and today is your big day!" Schwarzenegger wrote in the caption. "You have earned all of the celebration and I'm so proud of you. I love you!"
Baena also posted a photo with his father, among several others from the big day, writing, "Some of the best times of my life are because of this school and the people in these pictures. I am so incredibly grateful to have the privilege to study at and graduate from such a beautiful and high caliber school. I now have my degree in business administration and with that, I believe this is only the beginning of a new road. Let's see where it takes us!"
Arnold is also dad to 29-year-old Katherine, 27-year-old Christina, 25-year-old Patrick, and 21-year-old Christopher with Shriver. Katherine recently got engaged to Chris Pratt. Here’s details on their whirlwind romance: