The Proposal (2009)

This is an imperfect-but-creditable movie. When high-powered book editor Margaret (Sandra Bullock) faces deportation to Canada, the quick-thinking executive declares that she's actually engaged to her unsuspecting put-upon assistant Andrew (Ryan Reynolds), who she's tormented for years. He agrees to participate in the charade, but with a few conditions of his own. The unlikely couple heads to Alaska to meet his quirky, well-heeled family.

It became Bullock's first No. 1 movie in 10 years, and also marked her biggest opening weekend. It is a very bad idea to marry just to become a citizen. Interestingly, he is Canadian and she is American, but they play the opposite nationalities in the film. An immigrant who marries a US citizen can be given conditional residence for two years to make sure they are not committing marriage fraud and then they can apply for permanent residence.