Katherine Schwarzenegger Celebrates 26th Birthday With Family, Including Arnold Schwarzenegger & Maria Shriver - E!

Happy birthday, Katherine Schwarzenegger!
The daughter of Arnold Schwarzenegger and Maria Shriver turned 26 on Sunday and celebrated her birthday over the weekend with her family. Katherine's brother Patrick Schwarzenegger, 22, posted on his Instagram page an adorable photo of himself with Katherine, their parents and siblings Christina Schwarzenegger, 24, and Christopher Schwarzenegger, 18, standing around a birthday cake.
"Happy birthday sisssstaaah @katherineschwarzenegger," Patrick wrote on Sunday.

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