Chevy Chase

Clark Griswold

Beverly D'Angelo

Ellen Griswold

Randy Quaid

Cousin Eddie

Ethan Embry

Rusty Griswold

Marisol Nichols

Audrey Griswold

Miriam Flynn

Cousin Catherine

Shae D'Lyn

Cousin Vicki

Wayne Newton

Wayne Newton

Siegfried Fischbacher

Siegfried

Roy Horn

Roy

Wallace Shawn

Marty

Sid Caesar

Mr. Ellis

Julio Oscar Mechoso

Limo Driver

Julia Sweeney

Mirage Reception Person

Corinna Harney

Girl at Blackjack Table

Christie Brinkley

Woman in Ferrari

Juliette Brewer

Cousin Ruby Sue

John Finnegan

Hoover Dam Guide

Howard Platt

Maitre'd

Maria Cina

Mirage Cashier

C.C. Costigan

Kelli

Shannah Laumeister Stern

Mariah

Bud Ekins

O'Shea's Security Guard

Jerry Weintraub

Jilly

S.A. Griffin

Pit Boss

Lou DiMaggio

Casino Host

Jason Stuart

Buffet Guy

Clinton Brandhagen

Valet

Rusty Meyers

Club Manager

Billy Morrissette

Paramedic #1

Larry Hankin

Preacher

Alana Austin

Tourist (uncredited)

Vanessa Bednar

Hot Pool Model (uncredited)

Jeffrey Donovan

Hotel Employee (uncredited)

Billie Perkins

Casino Guest (uncredited)

Toby Huss

Fake ID Salesman (uncredited)