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Chris Pratt is celebrating his son Jack’s birthday milestone. On Sunday, Aug. 17, the actor posted a sweet tribute to his son, whom he shares with ex Anna Faris, in honor of his 13th birthday.

Originally appeared on E! Online .

Chris Pratt is the guardian of his own little galaxy.

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The Marvel star shared a Thanksgiving snap all dressed up with wife Katherine Schwarzenegger and their daughters Lyla, 5, and Eloise, 3, as well as their son Ford, 13 months, and his son Jack, 12, whom he shares with ex-wife Anna Faris .

Although the kids’ faces were covered with white hearts to maintain their privacy, the rare family photo still showed just how similar they are, as the childr

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