Tom Hanks
Lawrence Whatley Bourne III
Tim Thomerson
John Reynolds
George Plimpton
Lawrence Bourne Jr.
Allan Arbus
Albert Bardenaro
Xander Berkeley
Kent Sutcliffe
Jacqueline Evans
Aunt Eunice
Pamela Gual
Tammy the Stewardess
Virginia Kiser
Evelyn Bourne
Jude Mussetter
Bootsy Winder
Professor Toru Tanaka
Sumo Guard
Doris Day
Self (archive footage) (uncredited)
Rock Hudson
Self (archive footage) (uncredited)
Marilyn Monroe
Self (archive footage) (uncredited)