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So Grown Up!Sarah Jessica Parker Shares New Photo of Son James Wilkie in Honor of His 13th Birthday — See the Pic!

Sarah Jessica Parker and Matthew Broderick's son is getting so big!

On Thursday, Oct. 29, the 50-year-old actress took to Instagram to share a new photo of James Wilkie Broderick in honor of his 13th birthday — and we can't get over how handsome he is!

"I might do this all day long. Cause I love [him] so. HAPPY BIRTHDAY JW! XXX, Mama," the former Sex and the City star captioned the sweet snapshot of herself giving her teenage son a kiss on the head.

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Matthew, 53, and Sarah Jessica — who married in May 1997 — welcomed James Wilkie in October 2002. The couple are also parents to six-year-old twin daughters, Marion and Tabitha, whom they welcomed via surrogate in June 2009.

Click through the gallery below to see more Hollywood kids then and now!