Richard Benjamin as John

Paula Prentiss as Mary

Jeffrey Tambor as Waldemar

Severn Darden as Van Helsing

Kari Michaelsen as Debbie

Kevin Brando as Billy

Rosemary DeCamp as Aunt Lucille

Carole Androsky as Marge

Roberta Collins as Cousin Rhonda

Stacy Keach, Sr. as Attorney

Allen Joseph as Uncle Bert

Nancy Lee Andrews as Yolanda

Paul "Mousie" Garner as The Major

Annie O'Donnell as Annette Muldowney

Thomas Newman as Cousin Phil

Craig Coulter as Deliveryperson

Renee Braswell as Stuntperson

Elizabeth Charlton Davey as French Maid

Irwin Russo as Truck Driver

Michael Miller as Ernie Muldowney

Patrick Campbell as Mailman (uncredited)

Bob Esensten as Attorney Delivering Boxes #1 (uncredited)

Stephen Kurzfeld as Attorney Delivering Boxes #2 (uncredited)