Blonde Venus

Marlene Dietrich Helen Faraday, aka Helen Jones

Herbert Marshall Edward 'Ned' Faraday

Cary Grant Nick Townsend

Dickie Moore Johnny Faraday

Gene Morgan Ben Smith

Rita La Roy 'Taxi Belle' Hooper

Robert Emmett O'Connor Dan O'Connor

Sidney Toler Detective Wilson

Morgan Wallace Dr. Pierce

Al Bridge Bouncer (uncredited)

Marcelle Corday Helen's Maid in France (uncredited)

Cecil Cunningham Cabaret Manager in Norfolk (uncredited)