Robert Pattinson’s New Costar Sarah Gadon Is No Threat To Kristen Stewart

By: Taryn Ryder / March 30, 2011

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Robert Pattinson’s new Cosmopolis costar, Sarah Gadon, was announced this week and speculation has already started as to how she could affect Rob’s relationship with girlfriend Kristen Stewart.

Sarah is pretty, no doubt, but is she really a threat to the Twilight couple’s relationship? Celebuzz staffers give a collective yeah right! Friends of the up-and-coming actress seem to agree. Sources close to Gadon tell E! News that Sarah is already “taken” and is truly a “sweet girl.”

“She’s so not like that,” a pal told Ted Casablanca.

Is everyone forgetting Rob is so not like that either?

As if you didn’t already think Pattinson was a total sweetheart, just yesterday he melted our hearts by telling Italian Vanity Fair that he “doesn’t understand why people cheat.”

While you may not get Rob discussing his relationship with Kristen Stewart (“my private life is off-limit” he said earlier this week), Pattinson did reveal he is not one for “short and superficial love affairs” or “casual relationships.”

Well, there is nothing casual about Rob and Kristen’s relationship. Just because R.Pattz has a female costar (and there are sure to be many more in his future) there is no need to worry Twi-hards.

A restaurant source at Rockwell’s in Squamish, BC, where Breaking Dawn is currently being filmed confirmed to Celebuzz that Rob and Kristen were in attendance at a private cast dinner there earlier this week.

“They were in with a group of people and have come in before,” a restaurant source confirms. “Rob and Kristen are a very polite couple.”

While our employee source stayed mum on details to “respect their privacy,” tweeters at the restaurant say Pattinson and Stewart were kissing throughout dinner.

We’re inclined to believe them!