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For someone who joked that he wouldn't date 22-year-old Jennifer Lawrence because he "could be her father," Bradley Cooper definitely has tongues wagging -- he's reportedly dating a 20-year-old!

The handsome Oscar nominee, 38, was spotted in Boston on Monday, hanging out on the set of his new film with young British model Sookie Stackhouse Suki Waterhouse.

Us Weekly reports that this is the second time Cooper and Waterhouse have been spotted together, the first being after an awards show in London last month.

"It's new but they're hanging out," a source told the mag. "He's really into her."

Bradley and his "Words" costar Zoe Saldana ended their relationship late last year, and before that he famously dated Renee Zellweger for two years.

FYI, the "Hangover" star is in Beantown and reunited with Lawrence and their "Silver Linings Playbook" writer-director David O. Russell for Russell's upcoming "Untitled Abscam Project," based on a real-life FBI sting operation from the '70s.

There's an 18 year age difference between the rumored new couple. Check out more famous May-December romances by clicking "Launch Gallery" above!

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