Ali MacGraw and Ryan O'Neal

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Love Story
In December 1970, a little movie made a big splash at the box office. Love Story is credited with creating the chick flick film genre and is still thought of as one of the most romantic movies in history. People lined up to see the top-grossing film of the year, and millions fell for heartthrob Ryan O'Neal and the raven-haired Ali MacGraw, who uttered the immortal words: "Love means never having to say you're sorry."

Forty years after Love Story debuted, Ali and Ryan reunited on The Oprah Show stage. Ali said she still remembered Ryan's audition and their instant chemistry. "First of all, he's a great kisser," she said. "It's a combination of somebody who's incredibly sexy but funny. That's just electrifying."