Bradley Cooper learned "the art of the flip" at a Burger King in Leicester Square in preparation for upcoming flick "Adam Jones."
"Bradley was training alongside genuine Burger King staff. The aim was to learn the art of the flip, which he nailed fairly quickly," an insider revealed to The Sun.
"There was no real fanfare from him. You'd never know he was a big star by the way he spoke to people," the source continued. "He spent Sunday night learning the skills while the restaurant was open to the public and then filmed for most of the day on Monday."
Cooper also received pointers from celebrity chef Gordon Ramsay.
"As well as giving Bradley a few top tips on cooking, I've taught him the most important thing he needs to know in order to get by in a kitchen - how to swear," he said of "The Hangover" actor.
Suki Waterhouse's other half plays main character Adam Jones alongside Uma Thurman, Sienna Miller, and Emma Thompson.
The "Silver Linings Playbook" star was recently slammed by former flame Jennifer Esposito in memoir "Jennifer's Way."
Though she never officially mentions his name, the New York Daily News states it is easy to assume Esposito means the "American Hustle" star. Other experiences in the book include her battle with celiac disease, losing teeth on set, and having panic attacks.
The actress recalls a man asking her out with "a marching band of red flags" she ignored. Esposito did not find Cooper "necessarily attractive," but felt he was "funny, smart, cocky, arrogant, and a master manipulator."
She also adds "The Hangover" star "had a mean, cold side" and "his personality could flip on a dime." The pair quickly became a couple despite Esposito's doubts.
"I became very sad and I felt very alone," she writes, yet stayed in her relationship.
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