Hollywood serial daters Jake Gyllenhaal and Rachel Bilson are reportedly a couple, according to new romance reports.
 
Gyllenhaal, who has dated Reese Witherspoon and Kirsten Dunst, and Bilson, who recently split from fiance Hayden Christensen, are an item, according to HollyScoop.com.
 
A source close to the couple tells the website, "They're trying to keep a low profile but they're definitely dating."
 
Bilson also dated her "The O.C." co-star Adam Brody.

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