Who's Older: Kevin McKidd or Patrick Dempsey? You'll Be Surprised 2 of 2 Previous Autoplay Next Share Tweet September 5, 2013 at 09:00AM EDT by Rebecca Martin Related: Grey's Anatomy, Features, Patrick Dempsey, TV Stars, Kevin McKidd full size Credit: Bob D'Amico/ABC Patrick Dempsey Is Older Than Kevin McKidd! Patrick Dempsey was born on January 13, 1966, which he's 47, while Kevin McKidd was born on August 9, 1973, making him 40. Did you get it right? Let us know in the comments below!