Kristen Stewart Not Dating Zac Efron? 'He's Too Buff'

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(PHOTO) REUTERS/Mike SegarKristen Stewart poses at the Metropolitan Museum of Art Costume Institute Benefit

Kristen Stewart is reportedly not dating Hollywood actor Zac Efron, despite new claims suggesting they are romantically involved.

The "Twilight" actress, 23, is reportedly fond of the actor but a source claims that any possibility of the pair dating is unlikely. Stewart split from her on-and-off boyfriend, Robert Pattinson, in May and she is said to be moving on with her life.

"Kristen like every other girl in the world thinks that Zac Efron is hot but she isn't actively pursuing him," a source told

"He's actually too buff. She likes skinnier and more the hipster type of guys," the insider explained, adding "Don't hold your breath for this relationship to ever happen."

In August, reports claimed Pattinson, 27, was missing Stewart after moving out of her Los Feliz mansion. While fans are eager for a reconciliation between the exes, the "Camp X Ray" actress is reportedly focused on rebuilding her life without the British actor.

(Photo: Reuters/Luke MacGregor)Zac Efron poses as he arrives for the British premiere of ''Me and Orson Welles'' at Leicester Square in London, November 18, 2009.

"Kristen is the happiest she's been in a long time. She feels a sense of freedom being in Berlin and is having a really fun time on the set and just exploring the city and the countryside," a source told

"She is with a couple of her good friends from back home. They are like her extended family and have been supporting her nonstop," the alleged friend explained. "Her friends always remind her to not take life or herself too seriously. They do a good job of bringing out her silly, goofy side."

Pattinson and Stewart, who began dating in 2008, reportedly lived together prior to their abrupt split. The actor is rumored to have initiated the breakup, but some critics believe he regrets leaving Stewart and moving to Beverly Hills.

(PHOTO) REUTERS/Mario AnzuoniKristen Stewart and Robert Pattinson first began dating in 2008

"Rob is missing Kristen like crazy. He thought by moving to Beverly Hills and hanging out with his new friends it would take his mind off Kristen, but it has done the complete opposite," a source told "His distractions are only making him miss Kristen more."

"He is lonely and sad. He's in a new home, but it doesn't matter, having Kristen not around isn't the same," the source said. "He used to laugh with Kristen and things just aren't the same with her not around."