After Hall declined to reprise his role ( he decided to star in Weird Science instead ) , the producers decided to recast both children .
Dana Hill and Jason Lively replace Dana Barron and Anthony Michael Hall as Griswald children Audrey and Rusty .
After Anthony Michael Hall declined to reprise Anthony Michael Hall 's role ( Dana Hill decided to star in Weird Science instead ) , the producers decided to recast both children .
Dana Hill and Jason Lively replace Dana Barron and Anthony Michael Hall as Griswald children Audrey and Rusty .