|National Lampoon's Vacation (1983)||40||29||15||15||Anthony Michael Hall & Dana Barron|
|National Lampoon's European Vacation (1985)||42||31||?||21||Jason Lively & Dana Hill|
|National Lampoon's Christmas Vacation (1989)||46||35||14||16||Johnny Galecki & Juliette Lewis|
|National Lampoon's Vegas Vacation (1997)||54||43||19||24||Ethan Embry & Marisol Nichols|
November 22, 1989
Well, maybe not immortal, but young Rusty and Audrey Griswold seemed to have discovered some kind of elixir for slowing the aging process. Assuming the actors who play Rusty and Audrey are always "playing their age", there's some kind of voodoo hoodoo going on at the Griswold household.
NOTE: 11/22/89 was the day before Thanksgiving)