Quote From Today... Indiscreet (1958)

  "Oh, you'd be surprised."

With Ingrid Bergman.

Indiscreet was Cary Grant's 64th full length feature film.

Anna Kalman : You're the most transparent man I ever saw. I hope NATO isn't trusting you with any secrets.

Philip Adams: Oh, you'd be surprised.

Anna Kalman: Let's hear one.

Philip Adams: Oh, you would be surprised, Mata Hari.