Engaged Rachel Bilson, Hayden Christensen "Taking a Break"

Credit: Michael Tran/FilmMagic; Mike Coppola/FilmMagic

Rachel Bilson and Hayden Christensen are "taking a break," a source tells UsMagazine.com. The two announced their engagement in February 2009.

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Bilson, 28, flashed a ringless finger to Us on the red carpet of the THQ/Take No Prisoners event in L.A. Wednesday night. When asked how wedding plans were going, she said, "No, no plans" and pointed to her bare hand. "No nothing."

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The source says the couple -- who co-starred in 2008 action flick Jumper  -- are "taking about a month off" and will then revisit their relationship to decide if they should stay together.