Robert Pattinson shocked paparazzi when he stepped out for a grocery shopping run in Los Angeles on Wednesday.

X17 Online published photos of the actor wearing an unusual amount of facial hair, with sunglasses and a muscular physique. He appears to have gained a significant amount of muscles mass in the pctures taken on Oct. 16.

His navy T-shirt and shorts revealed bulkier arms, a beefed up torso andf more muscular legs. He completely shed his clean cut image he is known for in the Twilight films playing Edward Cullen.

Pattinson's was guided by personal trainer Harley Pasternak, who recently shared secrets about the British hearthrob's new workout regiment.

"He tries to come whenever he is able to come in, so sometimes five days a week," Pasternak recently told Us Weekly. "He has really got it going on all cylinders. He's eating properly, he's exercising . . . he's not a fitness fanatic. He's not someone who normally loves working out, but he's just sort of in a rhythm now."

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It was previously reported that Pattinson was being trained by Sydney Liebes, a personal trainer who works in Pasternak's studio. A friend petite brunette told X17Online Liebes has been training Pattinson to prepare him for an upcoming film.

"I talked to Sydney and she's excited about training Rob," said the source. "She said, 'He's a really cool guy; we're spending a lot of time together in the gym almost every day. He's fun to work with.' "

Liebes' friend admitted it was shocking to learn she acquired a huge celebrity client so early in her career. Liebes, who is from Westlake Village, graduated from high school in 2008, according to the report. Her Instagram revealed she graduated from college in May of this year.

"Sydney just started working as a trainer this summer, so I'm surprised she got this gig," added the source. "I don't know why Rob would hire her, when she has so little experience, other than because she's cute."

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