Love Happy (1949)

In director David Miller's anarchic comedy - the Marx Bros' final starring feature, and noted for Marilyn Monroe's small but early memorable walk-on role:

• Detective Sam Grunion's (Groucho Marx) beautiful blonde client (Marilyn Monroe), who made a dramatic entrance into Grunion's Detective Agency, while Sam held the door open
• after she sashayed into the office, Sam asked: "Is there anything I can do for ya?" - followed by a pause, reflection, a glance at the audience, and then an aside: "What a ridiculous statement!"; she put her hand on his right shoulder and responded: "Mr. Grunion. I want you to help me"; Grunion was cooperative: "What seems to be the trouble?"; she told him: "Some men are following me," after which he replied: "Really? I can't understand why" - and then rolled his eyes; he volunteered to accompany her to the bus station when she was asked to leave: "I'll take ya down to the bus station. Oh, if I'm not back tonight, go ahead without me. That's been the history of all my romances"