Which movie made you a fan

[ajitpd]

I come across many movies which have made me an avid fan of certain actors who were previously rather unknown to me for a number of reasons.
Here are a couple examples:
Pirates of the Caribbean: Curse of the Black Pearl made me a fan of Johnny Depp. It was Mr. Depp's first movie that I ever saw.
Scent of a Woman made me a fan of Al Pacino. I had previously seen some of his movies but was never impressed.

My question:
Which movie made you fan of any actor/actress? I am hoping to get some fantastic suggestions for my personal summer movie rush.

Thanks,
Ajit