Watch Out, Kristen Stewart — Is Robert Pattinson's Sexy Costar Trying To Tear Him Away From You? New Report!

Wed, June 8, 2011 10:18am EDT by 55 Comments

‘Cosmopolis’ Costar Sarah Gadon certainly has a reason for revenge against Kristen Stewart!

Robert Pattinson is currently filming Cosmopolis in Toronto, and word is that his sexy costar Sarah Gadon is pursuing a romance with her costar — in order to get revenge against his girlfriend Kristen Stewart!

Sarah, 24, is still jealous that Kristen, 21, won out the role in Snow White and the Huntsman — they auditioned for the same part!

“When Kristen won the role, Sarah was apparently crushed,” an insider tells OK!

And now that Sarah is partying on-set with Rob, 25, Kristen is getting more jealous than ever since Rob has been gushing about her in the press!

“[Kristen] still can’t help but wonder if he has a thing for Sarah,” the source says.

Tell us, HollywoodLifers — does Kristen have a reason to worry?

— William Earl

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