Marilyn Manson's ex was spotted getting cozy with Jason at the Critics' Choice Awards afterparty at the Viceroy hotel. "They were outside by themselves the whole time, chain smoking and flirting," says an onlooker.
The new twosome left the party together around 9:30 p.m.
And although Brangelina skipped the afterparty to have dinner at the nearby Dakota steakhouse, other celebs such as Sean Penn, Anne Hathaway, Emile Hirsch, Kate Beckinsale and Josh Brolin hit the party hosted by Diane Lane.
One partygoer apparently not impressed with Brad Pitt?
Elizabeth Banks, who was overheard telling Brolin and director Gus Van Sant that while she loved Milk, she isn't a fan of Benjamin Button.
"Nothing f--king happens," our source said Banks told the two. "Cate Blanchett was the best part of it."
—Reporting by Whitney English