I Met Him in Paris is a 1937 film made by Paramount Pictures, directed by Wesley Ruggles, written by Claude Binyon, and starring Claudette Colbert, Melvyn Douglas, and Robert Young. Wikipedia
Gene Anders: Do you mind if I tell you again that I love you?
Kay Denham: Go right ahead.
Gene Anders: Will you believe it?
Kay Denham: No. But I like it.