Patrick Schwarzenegger's Brother Christopher Graduates High School

Patrick Schwarzenegger and his brother Christopher grab a photo together on the field at Christopher’s high school graduation, which happened over the weekend.

The 22-year-old actor and model took to Instagram the next day to congratulate his 18-year-old borther on the accomplishment.

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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 heating into lunch at the Montage on Tuesday (June 7) in Beverly Hils, Calif.