Bradley Cooper, Olivia Wilde “Definitely Hooking Up”

 Stephen Lovekin/Getty Images; Jamie McCarthy/

Turns out Bradley Cooper and Olivia Wilde's recent flirt-fest — at NYC's Cinema Society afterparty for The Hangover Part II — wasn't a fluke.

"They're definitely hooking up," a source tells the new Us Weekly. The newly single stars met last year when Wilde, 27, read for a part in Limitless, and have reconnected in the wake of their high-profile breakups. (In March, Wilde filed for divorce from husband of eight years Tao Ruspoli; Cooper and Renee Zellweger ended their two-year relationship that same month.)

Wilde cozied up with Cooper, 36, at The Hangover II's May 23 bash — first gabbing in a VIP booth and then hanging out on the rooftop. The House: MD star even got a little territorial.

"Olivia acted jealous when other girls came up to him," the insider says. Just two days before, the duo left together from a Saturday Night Live afterparty, where Wilde had caught up with recent fling Justin Timberlake.

"She thought going with Bradley would make JT jealous," adds the source.

Whatever her motives, Wilde — who has also been seen with Ryan Gosling post-divorce — is loving the attention, another pal says.

"Guys have been coming after her since the moment she filed for divorce!"

UPDATE: Wilde's rep tells Us: "Olivia is single and not dating Bradley."

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