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 photo posted 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!"

Schwarzenegger makes the pilgrimage to Oktoberfest yearly, but this is the first year he brought Baena along with him.

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Joseph's mother, Mildred Baena, is the former housekeeper of Arnold Schwarzenegger and Maria Shriver. Shriver and Schwarzenegger ended their 25 year long partnership after she learned of his affair. Joseph Baena is Schwarzenegger's youngest child, born only 5 days after his other son, Christopher.