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Kate Hudson took full advantage of Throwback Thursday on Aug. 11 when she took to Instagram to share a very old, very epic family photo. In the snap, a young Kate [2] poses with her family, including mom Kate Hudson [3], stepdad Kurt Russell — whom she calls "Pa" [4] — and a few of her siblings [5]. She captioned it simply, "OG Squad." The group, who is all dressed in amazing '80s gear (Kurt's sunglasses are the best), smile for the camera in front of a beautiful backdrop. If we didn't know any better, this could easily pass as a scene from Chevy Chase's National Lampoon's Vacation.