Clark Griswold
Ellen Griswold
Audrey Griswold
Rusty Griswold
Clark Griswold Sr.
Nora Griswold
Art Smith
Frances Smith
Cousin Eddie Johnson
Cousin Catherine Johnson
Rocky Johnson
Ruby Sue Johnson (as Ellen Hamilton Latzen)
Lewis
Bethany
Bill
Todd Chester
Margo Chester
Mary
Delivery Boy
Frank Shirley (as Brian Doyle Murray)
Mrs. Shirley (as Natalia Nogulich)
Bozo #1
Bozo #2 (as Hank Hooker)
Swat Officer
Cop
Young Executive
Parade Announcer (voice)
Clark (age 9) (uncredited)
SWAT Team Sargeant (uncredited)
Downtown Shopper (uncredited)