Bradley Cooper cried when he read 'Romeo and Juliet'.

'The Hangover' actor - who is believed to be dating Zoe Saldana - is a hopeless romantic and sobbed his eyes out when he read William Shakespeare's classic love story in college, much to his own surprise.

Bradley told more! magazine: ''This is going to sound cheesy, but I remember taking a Shakespeare class in college where we had to read 'Romeo and Juliet'. I'd read it in high school, but not properly and I remember sitting in the library reading it and thinking, 'Hmm, this is weird.' I'm crying.''

The 37-year-old star then brushed off his comment and joked: ''I was probably really crying because it's the easiest play to understand and I was thinking about how after that I was going to have to get through 'Hamlet' and 'Twelfth Night'.

Bradley confessed he considered himself a romantic because he believes in instant attraction.

Asked if he is romantic, he said: ''I think so. I believe in love at first sight.''

And the hunky actor also admitted he writes love letters.

Asked when the last time he had ever penned a love letter to a girlfriend was, Bradley admitted: ''This morning. But I won't tell you who to - I think it'll just let that one sit there.''