John Hughes wrote this 1989 comedy, which once again puts Chevy Chase at the center of a slapstick-heavy story about the Griswold family. Randy Quaid all but steals the show as cousin Eddie, but watch the Griswold kids, who received a major upgrade for this holiday sequel. In 1983’s original National Lampoon’s Vacation, Rusty and Audrey were played, respectively, by Anthony Michael Hall and Dana Barron. Six years later, for Christmas Vacation, the young actors playing those roles are Johnny Galecki and Juliette Lewis.