AceShowbiz -

Jennifer Lawrence is reportedly worried that her boyfriend Darren Aronofsky will hook up with Charlize Theron. According to a new report from Star magazine, the 26-year-old actress believes her filmmaker beau is pursuing Theron "both romantically and professionally."

"Darren has a history of hooking up with his leading ladies. Jen's scared that he'll stray," a source tells the publication, after claiming that the "X-Men: Apocalypse" star thinks her 47-year-old boyfriend set his sights on another A lister for his next project.

"Everyone knows Darren tried to seduce Charlize two years ago but lost out to Sean Penn," the alleged insider adds. "The fact that she rejected him has only made him more determined. Darren's pulling out all the stops this time."

However, the report turns out to be "entirely false." A source with knowledge of the situation tells Gossip Cop that the story about the couple, whose romance blossomed after they worked together on his new feature film over the summer, is untrue.