'Christmas Vacation' cast wore cards with Chevy Chase's lines because he couldn't remember them

'Christmas Vacation' cast wore cards with Chevy Chase's lines because he couldn't remember them

"We all wore these placards around our necks with the lines so that he could just act, instead of going, 'What do I say now?'" costar Beverly D'Angelo recalled.Warner Bros/Courtesy Everett Collection Chevy Chase in 'National Lampoon's Christmas Vacation'Key pointsThe cast of National Lampoon's Christmas Vacation wore placards with Chevy Chase's dialogue around their necks.Chase confirmed that he couldn't remember all of his lines in a pivotal me…