I always thought Rusty was older than Audrey, besides Christmas Vacation

But:

V
Dana Barron (born April 22, 1966)
Anthony Michael Hall (born Michael Anthony Hall April 14, 1968) (yes, that's Hall's real name)

EV
Dana Hill (born Dana Lynne Goetz May 6, 1964)
Jason Lively (born Ronald Jason Lively; March 12, 1968)

CV
Juliette L. Lewis (born June 21, 1973)
John Mark "Johnny" Galecki (born April 30, 1975)

VV
Marisol Nichols (born November 2, 1973)
Ethan Philan Randall (born June 13, 1978)

V (2015)
Leslie Mann (born March 26, 1972)
Edward Parker "Ed" Helms[1] (born January 24, 1974)

Mind blown.