Confidential Lady (1940)

Jill Trevor vows revenge on newspaper baron Sir Joshua Morple, who she holds responsible for ruining her father. Her very public antics to draw attention to Morple's despicable conduct come to the notice a rival newspaper, who send journalist Jim Brent to offer to write up Jill's story, hoping to be able to dig up some dirt on Morple. Jim is initially skeptical, seeing Jill as a silly attention-seeking airhead, but as he gets to know her he changes his mind and realizes that her claims have substance, so the pair join forces to discredit Morple publicly, starting to fall in love with each other at the same time.