Randy Quaid
Miriam Flynn
Dana Barron
Jake Thomas
Sung Hi Lee
Julian Stone
Beverly Garland
Stephen Furst
Rodger Bumpass
Amanday Bynes

Randy Quaid as Cousin Eddie Johnson
Miriam Flynn as Cousin Catherine Johnson
Dana Barron as Audrey Griswold
Jake Thomas as Clark 'Third' Johnson
Sung Hi Lee as Muka Laka Miki
Julian Stone as Melbourne Jack
Beverly Garland as Aunt Jessica
Stephen Furst as Doctor (as Steve Furst)
Rodger Bumpass as British Man on Plane
Amanday Bynes as Professor Doornitz
Edward Asner as Uncle Nick (as Ed Asner)
Kate Bradley as Paige
Jay Greenberg as Santa Claus Security Guard
Caroline Walker as Air Traffic Controller's Wife
Sal Catalano as Taxi Driver