Scarlett Johansson has written many great love stories during her 27 years on earth.
PHOTOS: SCARLETT JOHANSSON'S MANY MEN
The We Bought a Zoo actress -- who celebrates her birthday Tuesday -- ended her two-year marriage with Ryan Reynolds in December 2010, but he was hardly the first A-list star to sweep Johansson off her feet.
PHOTOS: Scarlett and Ryan in happier times
The New York native began dating Jared Leto in 2004 -- the same year she was linked to Yankees slugger Derek Jeter. The actress' other exes include Josh Hartnett, Sean Penn, Justin Timberlake and Kieran Culkin.
VIDEO: Scarlett supports Planned Parenthood
"I don't think human beings are monogamous by nature. It's difficult -- you have to put a lot of effort into a relationship," Johansson once said. "I think it's hard for actors to date each other because they are so damn moody. You are away from people constantly and having a relationship that is strictly by phone, and it's miserable."
Tell Us: Which Hollywood star should Scarlett Johansson date next?
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