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Jon Kopaloff/FilmMagic, Mike Coppola/NBCUniversal/NBCU Photo Bank/NBCUniversal via Getty Images
Before playing beloved pediatrician Cooper on ABC's Private Practice, Adelstein appeared as Secret Service agent Paul Kellerman.
He would then go on to star in Bravo's Girlfriends' Guide to Divorce, as well as enjoy a recurring role on ABC's Scandal.
Adelstein, 51, married Gilmore Girls star Liza Weil in 2006, but the couple divorced in 2017. They share custody of their nine-year-old daughter Josephine.