Patrick Schwarzenegger Congratulates Brother Christopher on Graduating

Patrick Schwarzenegger poses for a photo with his brother Christopher at his high school graduation, which occurred over the weekend.

The 22-year-old actor and model congratulated his 18-year-old brother on the accomplishment in an Instagram post the next day.

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“C-1 graduated yesterday,” Patrick wrote. “Off to Michigan. Congrats brother.”

Their mom Maria Shriver posted a picture of herself and Christopher with his dad Arnold at the after party, writing, “Celebrating Christopher the graduate.”

Pictured inside: Patrick parking his car and heading into lunch at the Montage on Tuesday (June 7) in Beverly Hils, Calif.