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Arnold Schwarzenegger and his son Joseph Baena celebrated Baena's 19th birthday in a place where it's legal to drink beer as a teenager—at Oktoberfest in Munich, Germany.

Happy birthday, Joseph. Great student, great athlete. I'm proud of you and I love you!

A post shared by Arnold Schwarzenegger (@schwarzenegger) on

The father and son donned traditional Bavarian garb over their giant, muscley bodies as they raised a glass in honor of Joseph's birthday. The photo was posted to Ahhhhnold's Instagram, with the caption, "Happy birthday, Joseph. Great student, great athlete. I'm proud of you and I love you!"