Steve McQueen in The War Lover
Not sure if he was pilot qualified at the time they shot the film - or at least the flying parts of the film - at Bovington aerodrome. However, he is seen checking the turbocharger impellers for free rotation in prefilighting the Fort one scene and, despite the usual trembling yoke stuff (no doubt demanded by the director) he looked like a pilot.
Great lines from the film, as the McQueen/Robert Wagner B-17 climbs out of cloud:
Wagner (P2): "Look at that beautiful dawn, Buzz"
McQ (P1): "Dawns are for copilots..."