Over the weekend of August 15 at Fan Expo Chicago, a little family reunion took place for the beloved Griswolds as cast members from the original National Lampoon’s Vacation films, along with friends and fans, gathered in the Windy City to celebrate the 1983 comedy classic.

Clark Griswold and #1 Wally World himself, Chevy Chase, took to Instagram to mark the occasion, sharing a short video with the caption, “Great time this past weekend in Chicago at @fanexpochicago with old friends and new ones.”