Brendan Fraser movie "School Ties"
A Jewish boy goes to an elite prep school in the 1950's and hides his religion until a jealous bigot forces it out in the open.
His character is David Green. He's dating a girl named Chris Reese. When David is outed, Chris angrily asks him why he never told her he was Jewish. He says she never asked. She says he should have told her anyway. Then there's this exchange:
David Green: You never told me what religion you are.
Chris Reese: I'm a Methodist.
David Green: A Methodist. And all this time I didn't know it.