It's Christmas time and the Griswolds are preparing for a family seasonal celebration, but things never run smoothly for Clark, his wife Ellen and their two kids. Clark's continual bad luck is ...

Not every member of the cast has continued acting, however. Instead of following "The Big Bang Theory" with new projects like his castmates, Johnny ... Lampoon's Christmas Vacation" (1989) as ...

Johnny Galecki is an ... the films National Lampoon's Christmas Vacation (1989), I Know What You Did Last Summer (1997), In Time (2011) and Rings (2017). The Cast of I Know What You Did Last ...