Scarlett Johansson is single once again. Sources close to the star allege that after a year with boyfriend Nate Taylor, the pair have decided to part ways.

"She broke up with him last week," says a source. "He's pretty upset but the writing was on the wall. A lot of people were surprised it lasted this long."

Prior to dating Taylor, an advertising executive, she was linked to Sean Penn and before that was married to Ryan Reynolds.

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[via PEOPLE]