Aspiring comic Rupert Pupkin attempts to achieve success in show business by stalking his idol, a late night talk-show host who craves his own privacy.
Robert De Niro
as Rupert Pupkin
Jerry Lewis
as Jerry Langford
Sandra Bernhard
as Masha
Diahnne Abbott
as Rita Keane
Shelley Hack
as Cathy Long
Frederick de Cordova
as Bert Thomas
Kim Chan
as Jonno
Ed Herlihy
as Himself
Lou Brown
as Band Leader
Margo Winkler
as Receptionist
Ralph Monaco
as Raymond Wirtz
Catherine Scorsese
as Rupert's Mom (voice)