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Ashton Kutcher is the actor and entrepreneur (That '70s Show, Two and a Half Men) who dated Demi Moore in the early 2000s and was married to her from 2005 to 2013. In 2003, still her boyfriend, he joined the blended-family gathering for her Charlie's Angels: Full Throttle premiere.
His presence at family events in that era — folded into the same easy unit as Bruce, Demi and the kids — showed how porous and good-humored the Willis family boundaries were. New partners were absorbed, not treated as threats.