Washington D.C: It was a proud moment for famed bodybuilder Arnold Schwarzenegger as his youngest son, Joseph Baena, graduated from California's Pepperdine University. The actor shared a picture of himself congratulating his 21-year-old son, who can be seen wearing his cap and gown from the commencement at the University.

"Congratulations Joseph! Four years of hard work studying business at Pepperdine and today is your big day! You have earned all of the celebrations and I'm so proud of you. I love you!" he captioned the post.